tools: add _depot_tools to PATH (for V8 tests)

Ensures the `_depot_tools` dir bootstrapped during this script
is added to the PATH, before `ninja` is executed,
as `_depot_tools` already has a copy of `ninja` in it.
This means one less system requirement to be able to run this script.

(It seems like this was already intended to be on the PATH?)

Note: This script is used by the `test-v8` Makefile target.

PR-URL: #38299
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

tools/make-v8.sh

@@ -36,7 +36,8 @@ if [ "$ARCH" = "s390x" ] || [ "$ARCH" = "ppc64le" ]; then
   gn gen -v "out.gn/$BUILD_ARCH_TYPE" --args="is_component_build=false is_debug=false use_goma=false goma_dir=\"None\" use_custom_libcxx=false v8_target_cpu=\"$TARGET_ARCH\" target_cpu=\"$TARGET_ARCH\" v8_enable_backtrace=true"
   ninja -v -C "out.gn/$BUILD_ARCH_TYPE" d8 cctest inspector-test
 else
+  DEPOT_TOOLS_DIR="$(cd _depot_tools && pwd)"
   # shellcheck disable=SC2086
-  PATH=~/_depot_tools:$PATH tools/dev/v8gen.py "$BUILD_ARCH_TYPE" --no-goma $V8_BUILD_OPTIONS
-  PATH=~/_depot_tools:$PATH ninja -C "out.gn/$BUILD_ARCH_TYPE/" d8 cctest inspector-test
+  PATH="$DEPOT_TOOLS_DIR":$PATH tools/dev/v8gen.py "$BUILD_ARCH_TYPE" --no-goma $V8_BUILD_OPTIONS
+  PATH="$DEPOT_TOOLS_DIR":$PATH ninja -C "out.gn/$BUILD_ARCH_TYPE/" d8 cctest inspector-test
 fi