util/release: Test for rename(1) in genrelnotes

It's a separate package on debian, so it may not be installed with perl.

Change-Id: Id82661e1d7e6a025f5b207e3bd61669abc32d328
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/30340
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

util/release/genrelnotes

@@ -26,7 +26,7 @@
 
 # Check for tools
 
-if ! ( git --version && cloc --version ) > /dev/null 2>&1
+if ! ( git --version && cloc --version && rename --version ) > /dev/null 2>&1
 then
 	echo "ERROR: cloc or git is not installed.  Exiting"
 	exit 1