[source] tools/isl: update to 0.18

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/a0f4b4b3a2cd4db1a2b9bab3c06970361192368f

commit a0f4b4b3a2cd4db1a2b9bab3c06970361192368f
Author: Syrone Wong <wong.syrone at gmail.com>
AuthorDate: Sun May 7 19:39:12 2017 +0800

    tools/isl: update to 0.18
    
    Signed-off-by: Syrone Wong <wong.syrone at gmail.com>
---
 tools/isl/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/isl/Makefile b/tools/isl/Makefile
index 1d375a1..da37437 100644
--- a/tools/isl/Makefile
+++ b/tools/isl/Makefile
@@ -7,11 +7,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=isl
-PKG_VERSION:=0.17.1
+PKG_VERSION:=0.18
 
 PKG_SOURCE_URL:=http://isl.gforge.inria.fr
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
-PKG_HASH:=be152e5c816b477594f4c6194b5666d8129f3a27702756ae9ff60346a8731647
+PKG_HASH:=0f35051cc030b87c673ac1f187de40e386a1482a0cfdf2c552dd6031b307ddc4
 
 HOST_BUILD_PARALLEL:=1