contrib/gcc_update: silent mode

[Kaveh R. Ghazi]

 > > Zack - instead of trying to find this elusive portable shell syntax,
 > > why not just set $silent to "-Q" instead of "t" and put $silent in
 > > the command line without any decoration?
 > 
 > Because it's not always "-Q".  See touch_files_reexec.
 > zw

So?
	
	if test "$1" = '--silent'
	  silent1='-Q'
	  silent2='--silent'
	fi
	
	command1 $silent1 ...
	command2 $silent2 ...

Unless you've found a portable shell variable flag, seems like the
above would work everywhere.

		--Kaveh
--
Kaveh R. Ghazi			ghazi@caip.rutgers.edu