Stop building for freebsd-12 until #77 is resolved.
Stop building for freebsd-12 until #77 is resolved.

Change-Id: Ic59fd258d77a2b7f9010139564c7dc0e6472bcf1

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration