Make inline function static to fix clang compile error

Change-Id: I0432b8274a2764ba978dd6c4ed532fb7e4b7b519
diff --git a/av1/encoder/global_motion.c b/av1/encoder/global_motion.c
index 5d88dbf..d8abea9 100644
--- a/av1/encoder/global_motion.c
+++ b/av1/encoder/global_motion.c
@@ -25,7 +25,7 @@
 #define MAX_CORNERS 4096
 #define MIN_INLIER_PROB 0.1
 
-INLINE RansacFunc get_ransac_type(TransformationType type) {
+static INLINE RansacFunc get_ransac_type(TransformationType type) {
   switch (type) {
     case HOMOGRAPHY: return ransac_homography;
     case AFFINE: return ransac_affine;