Fix up git log statements:
authorWard Vandewege <ward@curoverse.com>
Wed, 8 Jul 2015 13:59:54 +0000 (09:59 -0400)
committerWard Vandewege <ward@curoverse.com>
Wed, 8 Jul 2015 13:59:54 +0000 (09:59 -0400)
commit510a6b6a1a8e263a7cfb305032ae3ef07d88a400
treecf3380e1b97e8ee732941c736694e26fd4c3b41c
parent6086e2a55293b8a21883f720788d951c3545cac6
Fix up git log statements:

* remove duplication between -n1 and --max-count=1
* make sure every git log statement has --first-parent

refs #6096
jenkins/run-build-packages.sh