Add back pypy install
Add back pypy install

Change-Id: If59a248071db21b3ae9f03719b12c86011a59a1b

sharbison3/python-docs-samples,GoogleCloudPlatform/python-docs-samples,canglade/NLP,BrandonY/python-docs-samples,GoogleCloudPlatform/python-docs-samples,JavaRabbit/CS496_capstone,JavaRabbit/CS496_capstone,GoogleCloudPlatform/python-docs-samples,hashems/Mobile-Cloud-Development-Projects,canglade/NLP,sharbison3/python-docs-samples,GoogleCloudPlatform/python-docs-samples,JavaRabbit/CS496_capstone,sharbison3/python-docs-samples,sharbison3/python-docs-samples,hashems/Mobile-Cloud-Development-Projects,BrandonY/python-docs-samples,BrandonY/python-docs-samples,BrandonY/python-docs-samples,canglade/NLP,JavaRabbit/CS496_capstone,canglade/NLP,hashems/Mobile-Cloud-Development-Projects,hashems/Mobile-Cloud-Development-Projects