buildgcc: Define $CMAKE only if clang package is built

This moves the CMAKE definition down into the case statement
for $PACKAGE so that it is only required when the user wants to
build clang.

With this approach, "./buildgcc -P clang" will error out with the
"ERROR: Missing tool:" message if cmake is not installed.

Change-Id: I1e5c1bd67ade8f93ba0390df7f234deb47b9b18a
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/10556
Tested-by: build bot (Jenkins)
Reviewed-by: Francis Rowe <info@gluglug.org.uk>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed