Bug 1812214 - Use llvm-ar/llvm-ranlib for macos builds of clang. r=firefox-build-system-reviewers,sergesanspaille

Differential Revision: https://phabricator.services.mozilla.com/D167755

build/build-clang/macosx64.json

@@ -3,7 +3,7 @@
     "cc": "{MOZ_FETCHES_DIR}/clang/bin/clang",
     "cxx": "{MOZ_FETCHES_DIR}/clang/bin/clang++",
     "as": "{MOZ_FETCHES_DIR}/clang/bin/clang",
-    "ar": "{MOZ_FETCHES_DIR}/cctools/bin/x86_64-apple-darwin-ar",
-    "ranlib": "{MOZ_FETCHES_DIR}/cctools/bin/x86_64-apple-darwin-ranlib",
+    "ar": "{MOZ_FETCHES_DIR}/clang/bin/llvm-ar",
+    "ranlib": "{MOZ_FETCHES_DIR}/clang/bin/llvm-ranlib",
     "ld": "{MOZ_FETCHES_DIR}/clang/bin/clang"
 }