Disable tests and examples

This patch disables the gettext-tools tests and examples, which are
generally not necessary.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/gettext-tools/Makefile.am
===================================================================
--- a/gettext-tools/Makefile.am
+++ b/gettext-tools/Makefile.am
@@ -20,7 +20,7 @@
 ACLOCAL = ../build-aux/fixaclocal @ACLOCAL@
 ACLOCAL_AMFLAGS = -I m4 -I ../gettext-runtime/m4 -I ../m4 -I gnulib-m4 -I libgrep/gnulib-m4 -I libgettextpo/gnulib-m4
 
-SUBDIRS = doc intl gnulib-lib libgrep src libgettextpo po projects styles misc man m4 tests gnulib-tests examples
+SUBDIRS = doc intl gnulib-lib libgrep src libgettextpo po projects styles misc man m4
 
 EXTRA_DIST = misc/DISCLAIM
 MOSTLYCLEANFILES = core *.stackdump