28a736ea30
The previous URL no longer works. The isl project has moved hosting to sourceforge.io. Update the mirror accordingly. This is fixed in Crosstool-NG 1.25.0, but the URL is included in config and needs to be updated there. Note: to make the rest of toolchains buildable, the same change should be applied to their configs. See also https://github.com/crosstool-ng/crosstool-ng/pull/1614. ^KT-58864