xfsprogs: clean up make install build V2

xfsprogs: clean up make install build V2

The install targets did not get the silent treatment like the
normal build targets. Shut them up.

Also, remove the top level install target dependency on the default
target. Each sub-directory already defines the correct dependencies
for the install targets and so all the rebuilds can be done in one
traversal of the subdirectories via the install rules.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>