libpixelflinger: ARMv6 specific objects are not used.  Remove.

This patch attempts to remove the generation of libpixelflinger_armv6,
which contains the ARMv6 specific object - rotate90CW_4x4_16v6.o.  But,
libpixelflinger_armv6 is not actually used by other projects.

Change-Id: I0e26fa2cf8b4dacfd208dd4279539c3e5b07580e
1 file changed