[libgxps] build: link libgxps with -lm

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 407e02691ba3e885f5f0b7e7b4163eb7d6080995
Author: Jason Crain <jason aquaticape us>
Date:   Thu Aug 20 02:24:58 2015 -0500

    build: link libgxps with -lm
    
    https://bugzilla.gnome.org/show_bug.cgi?id=753771

 libgxps/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libgxps/Makefile.am b/libgxps/Makefile.am
index 3f65da1..11d94a4 100644
--- a/libgxps/Makefile.am
+++ b/libgxps/Makefile.am
@@ -76,6 +76,7 @@ libgxps_la_LIBADD = \
        $(LCMS2_LIBS)   \
        $(LIBPNG_LIBS)  \
        $(LIBJPEG)      \
+       $(LIBM)         \
        $(LIBTIFF)
 
 EXTRA_DIST = \