fix indentation

fixing indentation to align with rest of the file.

Change-Id: I27b5cabee25c4de552d0c1bae3e2f3f53cf0fcc9
diff --git a/src/base/macros.h b/src/base/macros.h
index 26f3046..847105d 100644
--- a/src/base/macros.h
+++ b/src/base/macros.h
@@ -137,9 +137,9 @@
 #endif
 
 #if defined (__APPLE__)
-  #define HOT_ATTR
+#define HOT_ATTR
 #else
-  #define HOT_ATTR __attribute__ ((hot))
+#define HOT_ATTR __attribute__ ((hot))
 #endif
 
 // bionic and glibc both have TEMP_FAILURE_RETRY, but Mac OS' libc doesn't.