buildgcc: change -j variable name from BUILDJOBS to CPUS

The buildgcc makefile was using the variable 'BUILDJOBS' to pass the
number of cores to use for the build into buildgcc.  This is changed
to 'CPUS' to match the variable name for the what-jenkins-does target.

Change-Id: I373c4988e9f096ca2e142afdd5e94d7d806891e3
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/12299
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed