Use inline keyword without underscores consistently

s/__inline__/inline
s/__inline/inline

Change-Id: I5d8d930a7a41d678a0795e7a608dacbb9eb8cb37
diff --git a/libc/include/bits/swab.h b/libc/include/bits/swab.h
index 9591c2e..ebb7c74 100644
--- a/libc/include/bits/swab.h
+++ b/libc/include/bits/swab.h
@@ -33,7 +33,7 @@
 #include <sys/types.h>
 
 #if !defined(__BIONIC_SWAB_INLINE)
-#define __BIONIC_SWAB_INLINE static __inline
+#define __BIONIC_SWAB_INLINE static inline
 #endif
 
 __BEGIN_DECLS