get rid of the dependency on utils/CallStack.h

this makes it more explicit that we depend on 
libbacktrace (and therefore libbase, libunwind).

this also completely get rid of our direct 
dependency on libutils

Test: compiled
Bug: treble
Change-Id: Ib7b9d6be4f08cef401afe0d3d347e0250924a94f
diff --git a/opengl/libs/GLES2/gl2.cpp b/opengl/libs/GLES2/gl2.cpp
index c206041..f7fde96 100644
--- a/opengl/libs/GLES2/gl2.cpp
+++ b/opengl/libs/GLES2/gl2.cpp
@@ -19,7 +19,7 @@
 #include <string.h>
 #include <sys/ioctl.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <cutils/properties.h>
 
 #include "../hooks.h"