git-gui: Change base version to 0.6.
This is the start of the 0.6 series of git-gui. I'm calling it 0.6
(rather than any other value) as I already had a private tag on
one system based on 0.5, and that tag is quite a bit behind this
Signed-off-by: Shawn O. Pearce <email@example.com>
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 9fc80a6..8fac8cb 100755
@@ -1,7 +1,7 @@