utils: remove ?rev= suffix from toolchains URL
With the ?rev= suffix in the URL, the download fails:
1.010 tar: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz: Cannot open: No such file or directory 1.010 tar: Error is not recoverable: exiting now
Removing it fixes the issue
Signed-off-by: Mattijs Korpershoek mkorpershoek@baylibre.com