Let 'git gc' show up when executing 'git' with no arguments.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---

hpa recently asked git tree owners on kernel.org to pack their trees.
As I usually do not pack my local trees I started to look into man
pages, executing git etc and came up with 'git repack -d -l -f'
but was told the 'git gc' was the better way to do it.
This patch makes it easier to identify the 'git gc' command.

While investigating this I noticed that all git commands
are linked with help.o has the full set of commands. Seems a bit waste
of space but I did not tackle that.

	Sam

diff --git a/generate-cmdlist.sh b/generate-cmdlist.sh
index 975777f..e4e11ad 100755
--- a/generate-cmdlist.sh
+++ b/generate-cmdlist.sh
@@ -21,6 +21,7 @@ clone
 commit
 diff
 fetch
+gc
 grep
 init
 log
-
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