Linaro string handling routines: Give a option to use the older method

of memcpy for device compatibility testing.  The newer method of memcpy
provides a nice boost in performance.
Use export USE_OLD_MEMCPY=true
to use the older method of memcpy if you run into any issues.
For ARM deivces that are not ARMV7A the newer method of memcpy will
be used either way.

Signed-off-by:  Paul Beeler <sparksco@gmail.com>

Include bzero.S in all variants for arm devices.  This fixes the
game plague on the newer method of memcpy which was previously broken.
Might break camera on gnex, however that device is not currently
supported with SaberMod so therefore can not test...
TODO *//More testing

Reported-by: @xda user matthewdavis
Signed-off-by:  Paul Beeler <sparksco@gmail.com>
libm:  fix KRAIT_BIONIC_OPTIMIZATION

Fix krait mem opts again