Exclude build scripts other than workspace members

[taiki-e]

Closes #154

[taiki-e]

bors r+

before:

-object target/llvm-cov-target/debug/build/anyhow-939a4a1fe8fde2f5/build-script-build -object target/llvm-cov-target/debug/build/anyhow-939a4a1fe8fde2f5/build_script_build-939a4a1fe8fde2f5 -object target/llvm-cov-target/debug/build/camino-54eb4ba8577e169b/build-script-build -object target/llvm-cov-target/debug/build/camino-54eb4ba8577e169b/build_script_build-54eb4ba8577e169b -object target/llvm-cov-target/debug/build/cargo-llvm-cov-639d58c55b134f43/build-script-build -object target/llvm-cov-target/debug/build/cargo-llvm-cov-639d58c55b134f43/build_script_build-639d58c55b134f43 -object target/llvm-cov-target/debug/build/indexmap-b353add3fb84bff1/build-script-build -object target/llvm-cov-target/debug/build/indexmap-b353add3fb84bff1/build_script_build-b353add3fb84bff1 -object target/llvm-cov-target/debug/build/libc-5060fb361140490d/build-script-build -object target/llvm-cov-target/debug/build/libc-5060fb361140490d/build_script_build-5060fb361140490d -object target/llvm-cov-target/debug/build/memchr-24841978209fcd3d/build-script-build -object target/llvm-cov-target/debug/build/memchr-24841978209fcd3d/build_script_build-24841978209fcd3d -object target/llvm-cov-target/debug/build/proc-macro-error-2bbe3fdfc0574b62/build-script-build -object target/llvm-cov-target/debug/build/proc-macro-error-2bbe3fdfc0574b62/build_script_build-2bbe3fdfc0574b62 -object target/llvm-cov-target/debug/build/proc-macro-error-attr-bdefd0d4ea7823b3/build-script-build -object target/llvm-cov-target/debug/build/proc-macro-error-attr-bdefd0d4ea7823b3/build_script_build-bdefd0d4ea7823b3 -object target/llvm-cov-target/debug/build/proc-macro2-d54ba209e71916cf/build-script-build -object target/llvm-cov-target/debug/build/proc-macro2-d54ba209e71916cf/build_script_build-d54ba209e71916cf -object target/llvm-cov-target/debug/build/rustversion-0fcd536110f8cbf5/build-script-build -object target/llvm-cov-target/debug/build/rustversion-0fcd536110f8cbf5/build_script_build-0fcd536110f8cbf5 -object target/llvm-cov-target/debug/build/semver-a313562d41231e71/build-script-build -object target/llvm-cov-target/debug/build/semver-a313562d41231e71/build_script_build-a313562d41231e71 -object target/llvm-cov-target/debug/build/serde-22c4ba3b3f8d9ef8/build-script-build -object target/llvm-cov-target/debug/build/serde-22c4ba3b3f8d9ef8/build_script_build-22c4ba3b3f8d9ef8 -object target/llvm-cov-target/debug/build/serde_derive-f4e211fdda47dd7b/build-script-build -object target/llvm-cov-target/debug/build/serde_derive-f4e211fdda47dd7b/build_script_build-f4e211fdda47dd7b -object target/llvm-cov-target/debug/build/serde_json-66a59a8fa04dc34f/build-script-build -object target/llvm-cov-target/debug/build/serde_json-66a59a8fa04dc34f/build_script_build-66a59a8fa04dc34f -object target/llvm-cov-target/debug/build/syn-d78e2c4356f6d5b8/build-script-build -object target/llvm-cov-target/debug/build/syn-d78e2c4356f6d5b8/build_script_build-d78e2c4356f6d5b8 -object target/llvm-cov-target/debug/cargo-llvm-cov -object target/llvm-cov-target/debug/deps/cargo_llvm_cov-0dfebf5277065986 -object target/llvm-cov-target/debug/deps/cargo_llvm_cov-dc523417f43e39fc -object target/llvm-cov-target/debug/deps/cargo_llvm_cov-e2010b18b7a7ef10 -object target/llvm-cov-target/debug/deps/libclap_derive-3b65d682f108837a.dylib -object target/llvm-cov-target/debug/deps/libeasy_ext-531bc31ed578ab20.dylib -object target/llvm-cov-target/debug/deps/libproc_macro_error_attr-f188f866581a5f93.dylib -object target/llvm-cov-target/debug/deps/librustversion-66ee14ca3f11122e.dylib -object target/llvm-cov-target/debug/deps/libserde_derive-f57210abf604c274.dylib -object target/llvm-cov-target/debug/deps/test-16c206d54e39c5ec

after:

-object target/llvm-cov-target/debug/build/cargo-llvm-cov-639d58c55b134f43/build-script-build -object target/llvm-cov-target/debug/build/cargo-llvm-cov-639d58c55b134f43/build_script_build-639d58c55b134f43 -object target/llvm-cov-target/debug/cargo-llvm-cov -object target/llvm-cov-target/debug/deps/cargo_llvm_cov-0dfebf5277065986 -object target/llvm-cov-target/debug/deps/cargo_llvm_cov-dc523417f43e39fc -object target/llvm-cov-target/debug/deps/cargo_llvm_cov-e2010b18b7a7ef10 -object target/llvm-cov-target/debug/deps/libclap_derive-3b65d682f108837a.dylib -object target/llvm-cov-target/debug/deps/libeasy_ext-531bc31ed578ab20.dylib -object target/llvm-cov-target/debug/deps/libproc_macro_error_attr-f188f866581a5f93.dylib -object target/llvm-cov-target/debug/deps/librustversion-66ee14ca3f11122e.dylib -object target/llvm-cov-target/debug/deps/libserde_derive-f57210abf604c274.dylib -object target/llvm-cov-target/debug/deps/test-16c206d54e39c5ec

[bors]

Build succeeded:

• ci