[librsvg] build: Link test with libm

[Christian Persch <chpe src gnome org>]

commit 31251360fb506ada00c19205a15cc36da2f71b08
Author: Adam Sampson <ats-gnomebugs offog org>
Date:   Fri Oct 12 22:12:51 2012 +0200

    build: Link test with libm
    
    https://bugzilla.gnome.org/show_bug.cgi?id=685678

 tests/Makefile.am |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4ea1eb4..9dd5d15 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -34,6 +34,9 @@ libtest_utils_la_SOURCES = 				\
 	$(top_srcdir)/rsvg-size-callback.c		\
 	$(top_srcdir)/rsvg-size-callback.h
 
+libtest_utils_la_LIBADD = \
+	$(LIBM)
+
 EXTRA_DIST =						\
 	fixtures/crash/bug620238.svg			\
 	fixtures/dimensions/bug564527.svg		\