fix generate_projects.sh fails in M1 Mac (#31868)

* fix generate_projects.sh fails in m1 mac

* use buildozer-linux-arm64 for linux arm64 platform

tools/distrib/buildozer.sh

@@ -30,10 +30,12 @@ function error_handling() {
 }
 
 function download_buildozer() {
-    platform="$(uname -s)"
+    platform="$(uname -sm)"
     case "${platform}" in
-        Linux*)     download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDOZER_VERSION}/buildozer-linux-amd64";;
-        Darwin*)    download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDOZER_VERSION}/buildozer-darwin-amd64";;
+        "Linux x86_64")     download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDOZER_VERSION}/buildozer-linux-amd64";;
+        "Linux aarch64")    download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDOZER_VERSION}/buildozer-linux-arm64";;
+        "Darwin x86_64")    download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDOZER_VERSION}/buildozer-darwin-amd64";;
+        "Darwin arm64")     download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDOZER_VERSION}/buildozer-darwin-arm64";;
         *)                  error_handling "Unsupported platform: ${platform}";;
     esac
 

tools/distrib/fix_build_deps.py

@@ -637,6 +637,7 @@ def make_library(library):
     return (library, error, deps, external_deps)
 
 
+if __name__ == "__main__":
     update_libraries = []
     for library in sorted(consumes.keys()):
         if library in no_update: