revert changes.

Author: cloudwebrtc

webrtc-sys/libwebrtc/build_linux.sh

@@ -86,11 +86,6 @@ git apply "$COMMAND_DIR/patches/fix_pipewire_utils_compile.patch" -v --ignore-sp
 # See: https://github.com/zed-industries/zed/pull/51433#discussion_r2944567608
 git -C build apply "$COMMAND_DIR/patches/disable_crel.patch" -v --ignore-space-change --ignore-whitespace --whitespace=nowarn
 
-# is_clang=false selects the //build/toolchain/linux GCC toolchains, which pass a bare
-# "ar" to be resolved from PATH. gcc_toolchain.gni rebases that against root_out_dir and
-# declares the result as an input, so ninja refuses to run any alink edge.
-git -C build apply "$COMMAND_DIR/patches/fix_gcc_toolchain_ar_input.patch" -v --ignore-space-change --ignore-whitespace --whitespace=nowarn
-
 # GCC reports -Wchanges-meaning as an error rather than a warning, so
 # treat_warnings_as_errors=false does not cover it and WebRTC does not build without this.
 git -C build apply "$COMMAND_DIR/patches/disable_gcc_changes_meaning.patch" -v --ignore-space-change --ignore-whitespace --whitespace=nowarn
@@ -127,7 +122,6 @@ fi
 #
 #   use_custom_libcxx=false  keeps every std type in libwebrtc.a mangled the way
 #     libstdc++ mangles it, instead of Chromium's std::__Cr:: ABI namespace.
-#   is_clang=false           builds with the host GCC, so the compiler matches too.
 args="is_debug=$debug  \
   target_os=\"linux\" \
   target_cpu=\"$arch\" \
@@ -136,7 +130,6 @@ args="is_debug=$debug  \
   use_llvm_libatomic=false \
   use_custom_libcxx=false \
   use_custom_libcxx_for_host=false \
-  is_clang=false \
   use_clang_modules=false \
   rtc_include_tests=false \
   rtc_build_tools=false \
@@ -163,7 +156,7 @@ ninja -C "$OUTPUT_DIR" :default
 # make libwebrtc.a
 # don't include nasm
 ar -rc "$ARTIFACTS_DIR/lib/libwebrtc.a" `find "$OUTPUT_DIR/obj" -name '*.o' -not -path "*/third_party/nasm/*"`
-objcopy --redefine-syms="$COMMAND_DIR/boringssl_prefix_symbols.txt" "$ARTIFACTS_DIR/lib/libwebrtc.a"
+src/third_party/llvm-build/Release+Asserts/bin/llvm-objcopy --redefine-syms="$COMMAND_DIR/boringssl_prefix_symbols.txt" "$ARTIFACTS_DIR/lib/libwebrtc.a"
 
 # License generation is optional - may fail with some Python versions
 # Use vpython3 from depot_tools for consistent Python version