Make man page building quiet when DOCBOOK_XSL_172 is defined
Make man page building quiet when DOCBOOK_XSL_172 is defined

Tell xmlto to repress printing of the lines:

	Note: meta date   : No date. Using generated date       git-xyx
	Note: Writing git-xyz.1

Signed-off-by: Jonas Fonseca <3cc5e2600b36555e00dbc7f417b5fb2440e020fe@diku.dk>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git