AM_SILENT_RULES: tags shown for things other than compiling

[Alan Coopersmith]

As noted in the discussion on http://bugs.freedesktop.org/show_bug.cgi?id=24173
we could simplify the setup in components like libX11 when using silent rules
if we used AM_V_GEN for all custom rules, like using cpp to generate files.

Right now I've been putting in the custom rules, so silent mode prints:
   CPP Compose

Where AM_V_GEN would print
   GEN Compose

(for "generic" or "generate" I guess) - is the extra level of detail in knowing
if it's cpp or sed or whatever useful?    Or is "GEN" enough, since when you
need to debug you'll set V=1 anyway?

-- 
	-Alan Coopersmith-           alan.coopersmith at sun.com
	 Sun Microsystems, Inc. - X Window System Engineering