revert epoxy to 1.3.1 in build-melt.sh

Author: ddennedy

build/build-melt.sh

@@ -34,7 +34,7 @@ SWFDEC_REVISION=
 ENABLE_MOVIT=1
 MOVIT_HEAD=0
 MOVIT_REVISION="origin/shotcut-opengl3"
-LIBEPOXY_REVISION="1.5.10"
+LIBEPOXY_REVISION="v1.3.1"
 X264_HEAD=1
 X264_REVISION=
 X265_HEAD=1