[release.sh] Use git configured gpg binary if one is set (#5826)
[release.sh] Use git configured gpg binary if one is set (#5826)

For some reason, my local install of gpg includes both gpg 2 and gpg v1. When I run with the command gpg, I get gpg v1. My keys are setup by gpg v2. That's on my path as gpg2.

I setup git so that git knows to use gpg2, but pants' release doesn't.

This patch changes release.sh to look up the gpg binary from gits config, just like the signing key.
baroquebobcat/pants,benjyw/pants,jsirois/pants,benjyw/pants,pantsbuild/pants,baroquebobcat/pants,tdyas/pants,baroquebobcat/pants,benjyw/pants,pantsbuild/pants,tdyas/pants,baroquebobcat/pants,baroquebobcat/pants,tdyas/pants,baroquebobcat/pants,baroquebobcat/pants,twitter/pants,tdyas/pants,tdyas/pants,wisechengyi/pants,benjyw/pants,baroquebobcat/pants,wisechengyi/pants,wisechengyi/pants,benjyw/pants,wisechengyi/pants,benjyw/pants,twitter/pants,pantsbuild/pants,twitter/pants,jsirois/pants,tdyas/pants,tdyas/pants,pantsbuild/pants,baroquebobcat/pants,wisechengyi/pants,pantsbuild/pants,wisechengyi/pants,twitter/pants,wisechengyi/pants,wisechengyi/pants,jsirois/pants,twitter/pants,tdyas/pants,benjyw/pants,pantsbuild/pants,pantsbuild/pants,twitter/pants,wisechengyi/pants,tdyas/pants,twitter/pants,twitter/pants,twitter/pants