selftests: memfd_test: Revised STACK_SIZE to make it 16-byte aligned
selftests: memfd_test: Revised STACK_SIZE to make it 16-byte aligned

There is a mandate of 16-byte aligned stack on AArch64 [1], so the
STACK_SIZE here should also be 16-byte aligned, otherwise we would
get an error when calling clone().

[1] http://lxr.free-electrons.com/source/arch/arm64/kernel/process.c#L265

Signed-off-by: Chunyan Zhang <cc53b9072cdc13250c9bcdd8230df7750bc12cc4@linaro.org>
Acked-by: Arnd Bergmann <f2c659f01951776204a6c5b902787d9019fbeebd@arndb.de>
Signed-off-by: Shuah Khan <c62751f8c6ce7eb0639cab80a821801931863a4b@osg.samsung.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs