Adjust test to let it pass on libhoudini.

When using libhoudini to run arm code on x86 platforms, we can't
assume the main thread allocates local variables at the stack
declared by kernel.

(cherry picked from commit 61e4d461)

Bug: http://b/27815309
Change-Id: Ic714a8e633a0bb6e85b38ee0e01e3439d0a0cea5