[Ada] change verbosity in library builder

[Arnaud Charlet <charlet at adacore dot com>]

Tested on i686-linux, committed on trunk

The output in default mode when building a library, static or shared,
was found too verbose. This patch reduces the output in default mode.
The output in verbose mode is not modified. In default mode, the lists
of object files and ALI files are not displayed and if there is more than
one object files in the library, only the first object files in displayed
in the linking display line, the others being replaced by an "...".
The test for this is to build a library with more than one object file
in default mode and in verbose mode and to witnessed the differences
described above.

2007-04-06  Vincent Celier  <celier@adacore.com>

	* mlib.adb (Building_Library): Only output "building a library..." in
	verbose mode

	* mlib-prj.adb (Build_Library): Only output lists of object and ALI
	files in verbose mode.

	* mlib-utl.adb (Ar): Only output the first object files when not in
	verbose mode.
	(Gcc): Do not display all the object files if not in verbose mode, only
	the first one.

Attachment: difs
Description: Text document