arm/toolchains: update to 13.2.Rel1

Upgrade the Arm binary toolchains to the latest version.  Of note, the
untarred directory has camelcased the "R" in Rel (which was "rel" in the
previous versions).

Signed-off-by: Jon Mason <jon.mason@arm.com>

ci/get-binary-toolchains

@@ -2,7 +2,7 @@
 set -u -e
 
 BASENAME=arm-gnu-toolchain
-VER=${VER:-12.2.rel1}
+VER=${VER:-13.2.Rel1}
 HOST_ARCH=${HOST_ARCH:-$(uname -m)}
 
 # Use the standard kas container locations if nothing is passed into the script