Fix ndk and stl compiling

Move ndk linking against libc and libm out of system shared libraries
so that static libraries that link against the ndk can depend on
libc and libm, which is required to get the ndk sysroot include path.
Also make ndk stl versions only apply to the device variant of
multi-target builds.

Change-Id: I6926541da17b9baf3aa7f811a839c3b65c5d804d
1 file changed