[patch][python] Fix python/15579

[Tom Tromey]

>>>>> "Phil" == Phil Muldoon <pmuldoon@redhat.com> writes:

Phil> 2013-09-18  Phil Muldoon  <pmuldoon@redhat.com>
Phil> 	PR python/15579
Phil> 	* python/python.c: Document gdb.execute command in Python help.

Ok.

Tom