gbuild: print a better error message when adding non-existing Module

A confusing message "Corrupted module target stack!" is printed
because:

"If an included makefile cannot be found in any of these directories, a
warning message is generated, but it is not an immediately fatal error;
processing of the makefile containing the include continues.  Once it
has finished reading makefiles, make will try to remake any that are
out of date or don’t exist."

Change-Id: Ia728c0283885fe839dbf8dd8ae2a885230f23836
Reviewed-on: https://gerrit.libreoffice.org/47701
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Jenkins <ci@libreoffice.org>

0 files changed, 0 insertions, 0 deletions