include the arm header files in make dist

Change-Id: Ibcf5b4b14153f65ce1b53c3bfba87ad2feb17bbd
diff --git a/vp8/vp8cx_arm.mk b/vp8/vp8cx_arm.mk
index 599bf47..e8dbd5d 100644
--- a/vp8/vp8cx_arm.mk
+++ b/vp8/vp8cx_arm.mk
@@ -15,9 +15,12 @@
 # encoder
 VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/arm_csystemdependent.c
 
-VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/quantize_arm.c
-VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/picklpf_arm.c
 VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/dct_arm.c
+VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/dct_arm.h
+VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/encodemb_arm.h
+VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/picklpf_arm.c
+VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/quantize_arm.c
+VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/quantize_arm.h
 VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/variance_arm.c
 VP8_CX_SRCS-$(ARCH_ARM)  += encoder/arm/variance_arm.h