[PATCH][contrib] Update download_prerequisites to ISL 0.15.

[Alan Lawrence]

Since r229889, we now have tests that pass only with ISL 0.15. Although ISL 0.15
is not a requirement, it seems we should make it easy to build the compiler that
way.

Other opinions?

Thanks,
Alan

contrib/ChangeLog:

	* download_prerequisites: Update ISL version to 0.15.
---
 contrib/download_prerequisites | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/download_prerequisites b/contrib/download_prerequisites
index 6940330..a685a1d 100755
--- a/contrib/download_prerequisites
+++ b/contrib/download_prerequisites
@@ -48,7 +48,7 @@ ln -sf $MPC mpc || exit 1
 
 # Necessary to build GCC with the Graphite loop optimizations.
 if [ "$GRAPHITE_LOOP_OPT" = "yes" ] ; then
-  ISL=isl-0.14
+  ISL=isl-0.15
 
   wget ftp://gcc.gnu.org/pub/gcc/infrastructure/$ISL.tar.bz2 || exit 1
   tar xjf $ISL.tar.bz2  || exit 1
-- 
1.9.1