linux-next: build warnings after merge of the kbuild tree

Hi all,

After merging the kbuild tree, today's linux-next build (powerpc
ppc64_defconfig) produced these warnings:


Presumably introduced by commit

  1267f9d3047d ("kbuild: add $(BASH) to run scripts with bash-extension")

and presumably arch/powerpc/tools/unrel_branch_check.sh (which has no
#! line) is a bash script.  Yeah, is uses '((' and '))'.

-- 
Cheers,
Stephen Rothwell