don't set INLINE to 'always_inline'

INLINE is used quite widely in vp9, this change improves performance
1-2% on most modern platforms.

Change-Id: I8a9974aab89fa588ea4923cc7eaf6199e344a528

build/make/configure.sh

diff --git a/build/make/configure.sh b/build/make/configure.sh
index 7be583d..f980180 100644
--- a/build/make/configure.sh
+++ b/build/make/configure.sh
@@ -1272,9 +1272,6 @@
     check_cc <<EOF && INLINE="inline"
 static inline function() {}
 EOF
-    check_cc <<EOF && INLINE="__inline__ __attribute__((always_inline))"
-static __attribute__((always_inline)) function() {}
-EOF
 
   # Almost every platform uses pthreads.
   if enabled multithread; then