This adds the magic .note.GNU-stack section at the end of each ARM
 asm file (when built with gas), indicating that a non-executable
 stack is allowed.
Without this section, the linker will assume the object requires an
 executable stack by default, forcing an executable stack for the
 entire program.

Change-Id: Ie86de6a449b52d392b9e5e0479833ed8c508ee65