Ruby: build extensions for arm64-darwin

kokoro/release/ruby/macos/ruby/ruby_build_environment.sh

@@ -60,19 +60,18 @@ set -x
 ruby --version | grep 'ruby 2.7.0'
 for v in 3.0.0 2.7.0 ; do
   ccache -c
-  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=x86_64-darwin11 MAKE="$MAKE"
+  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=x86_64-darwin MAKE="$MAKE"
+  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=aarch64-darwin MAKE="$MAKE"
 done
 set +x
 rvm use 2.5.0
 set -x
 ruby --version | grep 'ruby 2.5.0'
 for v in 2.6.0 2.5.1 2.4.0 2.3.0; do
   ccache -c
-  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=x86_64-darwin11 MAKE="$MAKE"
+  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=x86_64-darwin MAKE="$MAKE"
+  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=aarch64-darwin MAKE="$MAKE"
 done
 set +x
 rvm use 2.7.0
 set -x
-
-sed 's/x86_64-darwin-11/universal-darwin/' ~/.rake-compiler/config.yml > "$CROSS_RUBY"
-mv "$CROSS_RUBY" ~/.rake-compiler/config.yml

ruby/Rakefile

@@ -91,7 +91,7 @@ else
     ext.cross_platform = [
       'x86-mingw32', 'x64-mingw32',
       'x86_64-linux', 'x86-linux',
-      'universal-darwin'
+      'x86_64-darwin', 'arm64-darwin',
     ]
   end