Whitespace cleanup for gitfat configuration

Change-Id: I736b2c30eab11e67ba1cd3060242fa4b64b61e97
Limit git-fat to artifacts subdirectory

Forcing git-fat for /all/ jars seemed unnecessarily greedy. As we only
need it in the artifacts directory for now, we limit git-fat to that
directory.

Change-Id: I793d0c769adf9effe42b6ddff0feff6f881da159
Merge "Whitespace cleanup for gitfat configuration"