Fix build on gcc 4.7

Fixes:
target asm: libm <= bionic/libm/arm/e_pow.S
/tmp/cc5RHbaP.s: Assembler messages:
/tmp/cc5RHbaP.s: Error: .size expression for pow does not evaluate to a constant

Change-Id: Ie6d1056c835d0db6da923d7286cb12a60253d5ff
Signed-off-by: Evan McClain <aeroevan@gmail.com>
bionic: Add workarounds for current compilers

With current compilers, we're getting "this function cannot be inlined"
errors on vsnprintf and strlcpy because the always_inline attribute is
set.

Before marking this a "fix" instead of a "workaround", we should figure
out why the functions can't be inlined.

PatchSet 2: Set the topic to linaro.
This is needed to build with AOSP's GCC 4.7.

Change-Id: Id6c5464defafb3f9044c102d32a57e70d760b05d
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>