libvpx: Pull from upstream

source/config/linux/x64/vp9_rtcd.h

Index: source/config/linux/x64/vp9_rtcd.h
diff --git a/source/config/linux/x64/vp9_rtcd.h b/source/config/linux/x64/vp9_rtcd.h
index 235c390c159ef9c9c79ba9467345d5e8159d3cae..142a58c8f51d1ff6018c2dfb197a0d737844ddfb 100644
--- a/source/config/linux/x64/vp9_rtcd.h
+++ b/source/config/linux/x64/vp9_rtcd.h
@@ -386,6 +386,14 @@ void vp9_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int dest_stride
 void vp9_iht8x8_64_add_sse2(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
 #define vp9_iht8x8_64_add vp9_iht8x8_64_add_sse2
 
+int16_t vp9_int_pro_col_c(uint8_t const *ref, const int width);
+int16_t vp9_int_pro_col_sse2(uint8_t const *ref, const int width);
+#define vp9_int_pro_col vp9_int_pro_col_sse2
+
+void vp9_int_pro_row_c(int16_t *hbuf, uint8_t const *ref, const int ref_stride, const int height);
+void vp9_int_pro_row_sse2(int16_t *hbuf, uint8_t const *ref, const int ref_stride, const int height);
+#define vp9_int_pro_row vp9_int_pro_row_sse2
+
 void vp9_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int dest_stride);
 #define vp9_iwht4x4_16_add vp9_iwht4x4_16_add_c
 
@@ -926,6 +934,10 @@ unsigned int vp9_variance8x8_c(const uint8_t *src_ptr, int source_stride, const
 unsigned int vp9_variance8x8_sse2(const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse);
 #define vp9_variance8x8 vp9_variance8x8_sse2
 
+int vp9_vector_sad_c(int16_t const *ref, int16_t const *src, const int width);
+int vp9_vector_sad_sse2(int16_t const *ref, int16_t const *src, const int width);
+#define vp9_vector_sad vp9_vector_sad_sse2
+
 void vp9_rtcd(void);
 
 #ifdef RTCD_C