system/core Replace log/log.h with android/log.h

Should use android/log.h instead of log/log.h as a good example
to all others.  Adjust header order to comply with Android Coding
standards.

Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I33a8fb4e754d2dc4754d335660c450e0a67190fc
diff --git a/libmemunreachable/log.h b/libmemunreachable/log.h
index cdfbfd9..dd146b6 100644
--- a/libmemunreachable/log.h
+++ b/libmemunreachable/log.h
@@ -19,6 +19,6 @@
 
 #define LOG_TAG "libmemunreachable"
 
-#include <log/log.h>
+#include <android/log.h>
 
 #endif // LIBMEMUNREACHABLE_LOG_H_