add asm_enc_offsets.c for all targets

now that we need asm_enc_offsets.c for x86 and arm and it is
harmless to build it for other targets, add it unconditionally

Change-Id: I320c5220afd94fee2b98bda9ff4e5e34c67062f3

vp8/vp8cx.mk

@@ -33,6 +33,7 @@ VP8_CX_SRCS-yes += vp8_cx_iface.c
 #INCLUDES += common
 #INCLUDES += encoder
 
+VP8_CX_SRCS-yes += encoder/asm_enc_offsets.c
 VP8_CX_SRCS-yes += encoder/bitstream.c
 VP8_CX_SRCS-yes += encoder/boolhuff.c
 VP8_CX_SRCS-yes += encoder/dct.c

vp8/vp8cx_arm.mk

@@ -14,7 +14,6 @@
 #File list for arm
 # encoder
 VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/arm_csystemdependent.c
-VP8_CX_SRCS-$(ARCH_ARM)  += encoder/asm_enc_offsets.c
 
 VP8_CX_SRCS-$(HAVE_ARMV7)  += encoder/arm/encodemb_arm.c
 VP8_CX_SRCS-$(HAVE_ARMV7)  += encoder/arm/quantize_arm.c