Also build the PIP package builder to test tensorflow.
Also build the PIP package builder to test tensorflow.

Change-Id: I3da2ecb8891a0804479a623e33a8e4376bcf2410

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