isl.gforge.inria.fr has been dead since early this month [1]. Switch to
libisl.sourceforge.io for the time being.
[1] https://groups.google.com/g/isl-development/c/JGaMo2VUu_8
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
PKG_NAME:=isl
PKG_VERSION:=0.24
-PKG_SOURCE_URL:=http://isl.gforge.inria.fr
+PKG_SOURCE_URL:=https://libisl.sourceforge.io/
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_HASH:=043105cc544f416b48736fff8caf077fb0663a717d06b1113f16e391ac99ebad