Remove "-mstackrealign" option from all x86 builds.

For ndk docs change, please refer to:
https://android-review.googlesource.com/#/c/110100/

Change-Id: I8428e7a979eb02441066aeeee43ce693d4d0dc8d
Signed-off-by: Alexander Ivchenko <alexander.ivchenko@intel.com>
Merge "Remove "-mstackrealign" option from all x86 builds."