libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_variance.c

Index: source/libvpx/vp9/encoder/vp9_variance.c
===================================================================
--- source/libvpx/vp9/encoder/vp9_variance.c	(revision 278778)
+++ source/libvpx/vp9/encoder/vp9_variance.c	(working copy)
@@ -156,6 +156,18 @@
   return vp9_variance##W##x##H##_c(temp3, W, dst, dst_stride, sse); \
 }
 
+void vp9_get16x16var_c(const uint8_t *src_ptr, int source_stride,
+                       const uint8_t *ref_ptr, int ref_stride,
+                       unsigned int *sse, int *sum) {
+  variance(src_ptr, source_stride, ref_ptr, ref_stride, 16, 16, sse, sum);
+}
+
+void vp9_get8x8var_c(const uint8_t *src_ptr, int source_stride,
+                     const uint8_t *ref_ptr, int ref_stride,
+                     unsigned int *sse, int *sum) {
+  variance(src_ptr, source_stride, ref_ptr, ref_stride, 8, 8, sse, sum);
+}
+
 unsigned int vp9_mse16x16_c(const uint8_t *src, int src_stride,
                             const uint8_t *ref, int ref_stride,
                             unsigned int *sse) {