multimedia/libx264: unbreak on arm* with LLD

ld: error: can't create dynamic relocation R_ARM_ABS32 against local symbol in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output

defined in common/arm/mc-a-8.o
referenced by common/arm/mc-a-8.o:(memcpy_table)