Add missing posix_memalign function in x86 libc.so.functions.txt.
(See b.android.com/28834)

android-17,-18,-19
	posix_memalign

Change-Id: I9e0632f9fa8cabd17a66ded2dc6f3553261c4054
Signed-off-by: Varvara Rainchik <varvara.rainchik@intel.com>
Merge "Add missing posix_memalign function in x86 libc.so.functions.txt. (See b.android.com/28834)"