Merge "goma.mk: do not start goma compiler_proxy if NOSTART_GOMA is set."

  # gomacc can start goma client's daemon process automatically, but

  # it is safer and faster to start up it beforehand. We run this as a

  # background process so this won't slow down the build.

  ifndef NOSTART_GOMA

    $(shell ( $(goma_ctl) ensure_start ) &> /dev/null &)

  endif

  goma_ctl :=

  goma_dir :=