[libglnx] Distribute libglnx.m4

[Colin Walters <walters src gnome org>]

commit 1e7b96808a168f8ea9066194613716fb0b27d559
Author: Dan Nicholson <nicholson endlessm com>
Date:   Wed Aug 31 13:16:06 2016 -0700

    Distribute libglnx.m4
    
    This is needed by ostree when creating a tarball with make dist.

 Makefile-libglnx.am |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/Makefile-libglnx.am b/Makefile-libglnx.am
index a812755..64d6a9a 100644
--- a/Makefile-libglnx.am
+++ b/Makefile-libglnx.am
@@ -15,7 +15,11 @@
 # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 # Boston, MA 02111-1307, USA.
 
-EXTRA_DIST += $(libglnx_srcpath)/README.md $(libglnx_srcpath)/COPYING
+EXTRA_DIST += \
+       $(libglnx_srcpath)/README.md \
+       $(libglnx_srcpath)/COPYING \
+       $(libglnx_srcpath)/libglnx.m4 \
+       $(NULL)
 
 libglnx_la_SOURCES = \
        $(libglnx_srcpath)/glnx-alloca.h \