[Buildroot] [git commit branch/2021.02.x] package/isl: switch to new site

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=c29f8228e8754250a7a5d263d1c173a2227b8861
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2021.02.x

isl.gforge.inria.fr no longer responds and the main site is now at
sourceforge.io.  This change corresponds to the upstream commit that
updates the documentation [1].

[1] https://repo.or.cz/isl.git/commitdiff/002820d725479b456c97ca9b0d59d6b3e18f7ee4

Signed-off-by: John Keeping <john at metanate.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
(cherry picked from commit 748b7878e90ab5813a6f48e156410cf38ef087d9)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/isl/isl.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/isl/isl.mk b/package/isl/isl.mk
index a1a597d038..c1d0689b5a 100644
--- a/package/isl/isl.mk
+++ b/package/isl/isl.mk
@@ -6,7 +6,7 @@
 
 ISL_VERSION = 0.22
 ISL_SOURCE = isl-$(ISL_VERSION).tar.xz
-ISL_SITE = http://isl.gforge.inria.fr
+ISL_SITE = https://libisl.sourceforge.io
 ISL_LICENSE = MIT
 ISL_LICENSE_FILES = LICENSE
 HOST_ISL_DEPENDENCIES = host-gmp