Temporarily disable test-capi-tiny on CI

.github/workflows/build-test.yml

@@ -145,8 +145,6 @@ jobs:
         packages: |
           sphinx
           sphinx-rtd-theme
-    - name: Install LLVM tooling
-      run: sudo apt-get install clang lld
 
     - name: Install Diplomat
       uses: actions-rs/cargo@v1.0.1

ffi/capi/examples/fixeddecimal_tiny/README.md

@@ -0,0 +1,15 @@
+# Tiny FixedDecimal FFI Demo
+
+This example contains tooling to build a size-optimized binary using FixedDecimal and FixedDecimalFormat in C over FFI.
+
+Prerequisites: `clang` and `lld`, which must be compatible with the Rust toolchain. `apt-get install clang lld` *might* work, but if you run into errors, refer to the following thread for tips:
+
+https://github.com/rust-lang/rust/issues/60059
+
+You also need to install the correct toolchains:
+
+```bash
+$ rustup install nightly-2021-02-28
+$ rustup component add --toolchain nightly-2021-02-28 rust-src
+$ rustup target add x86_64-unknown-linux-gnu --toolchain nightly-2021-02-28
+```

tools/scripts/ffi.toml

@@ -10,7 +10,8 @@ category = "ICU4X Development"
 dependencies = [
     "verify-diplomat-gen",
     "test-capi",
-    "test-capi-tiny",
+    # TODO(#964): Enable this CI test.
+    # "test-capi-tiny",
     "test-cpp",
     "build-wearos-ffi",
     "test-nostd",