on-off-test uses "$UID != 0" to test for root, but $UID is a construct
specific to bash.  Using /bin/sh that isn't bash results in the
following error (due to the "$UID" part expanding to nothing):
  ./on-off-test.sh: 9: [: !=: unexpected operator
Change Makefile to use bash instead.
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 all:
 
 run_tests:
-       @/bin/sh ./on-off-test.sh || echo "memory-hotplug selftests: [FAIL]"
+       @/bin/bash ./on-off-test.sh || echo "memory-hotplug selftests: [FAIL]"
 
 clean: