Use goma-aware Fuchsia clang toolchain (#9430)
Use goma-aware Fuchsia clang toolchain (#9430)

Update Fuchsia clang toolchain on Mac/Linux to goma-aware version,
tagged with `goma` in CIPD.

See:
https://chrome-infra-packages.appspot.com/p/fuchsia/clang/mac-amd64/+/goma
https://chrome-infra-packages.appspot.com/p/fuchsia/clang/linux-amd64/+/goma
aam/engine,jamesr/flutter_engine,aam/engine,rmacnak-google/engine,mikejurka/engine,flutter/engine,jason-simmons/flutter_engine,devoncarew/sky_engine,devoncarew/sky_engine,chinmaygarde/sky_engine,devoncarew/engine,aam/engine,cdotstout/sky_engine,cdotstout/sky_engine,jason-simmons/flutter_engine,chinmaygarde/sky_engine,devoncarew/engine,jamesr/sky_engine,jason-simmons/flutter_engine,jamesr/flutter_engine,jamesr/flutter_engine,cdotstout/sky_engine,devoncarew/sky_engine,cdotstout/sky_engine,flutter/engine,flutter/engine,chinmaygarde/flutter_engine,mikejurka/engine,Hixie/sky_engine,mikejurka/engine,flutter/engine,jason-simmons/sky_engine,mikejurka/engine,rmacnak-google/engine,Hixie/sky_engine,flutter/engine,tvolkert/engine,mikejurka/engine,devoncarew/sky_engine,tvolkert/engine,chinmaygarde/sky_engine,jason-simmons/sky_engine,jamesr/sky_engine,jamesr/sky_engine,mikejurka/engine,tvolkert/engine,devoncarew/sky_engine,chinmaygarde/flutter_engine,devoncarew/sky_engine,chinmaygarde/flutter_engine,cdotstout/sky_engine,jason-simmons/flutter_engine,devoncarew/engine,rmacnak-google/engine,jamesr/flutter_engine,tvolkert/engine,jason-simmons/sky_engine,devoncarew/engine,devoncarew/engine,tvolkert/engine,devoncarew/engine,Hixie/sky_engine,cdotstout/sky_engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,flutter/engine,rmacnak-google/engine,jason-simmons/flutter_engine,jason-simmons/sky_engine,aam/engine,flutter/engine,aam/engine,rmacnak-google/engine,mikejurka/engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,rmacnak-google/engine,aam/engine,jamesr/flutter_engine,jamesr/flutter_engine,chinmaygarde/flutter_engine,chinmaygarde/sky_engine,chinmaygarde/flutter_engine,rmacnak-google/engine,jamesr/sky_engine,cdotstout/sky_engine,jason-simmons/flutter_engine,jason-simmons/sky_engine,jason-simmons/sky_engine,aam/engine,jason-simmons/sky_engine,jamesr/sky_engine,devoncarew/sky_engine,chinmaygarde/sky_engine,mikejurka/engine,Hixie/sky_engine,mikejurka/engine,chinmaygarde/sky_engine,Hixie/sky_engine,Hixie/sky_engine,jamesr/flutter_engine,jamesr/flutter_engine,tvolkert/engine,aam/engine,flutter/engine,tvolkert/engine,jamesr/sky_engine,Hixie/sky_engine,jamesr/sky_engine,Hixie/sky_engine,jamesr/flutter_engine,devoncarew/engine,chinmaygarde/sky_engine