There's only one <sys/system_properties.h> now.

Change-Id: I4d535484b9e25fda304fb748b7796e513c832265
diff --git a/libcutils/trace-dev.inc b/libcutils/trace-dev.inc
index 3bc6dc3..c911b4f 100644
--- a/libcutils/trace-dev.inc
+++ b/libcutils/trace-dev.inc
@@ -36,8 +36,7 @@
 #include <log/log_properties.h>
 
 #if defined(__BIONIC__)
-#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
-#include <sys/_system_properties.h>
+#include <sys/system_properties.h>
 #endif
 
 /**