glestrace: Framework for GLES tracing library

This patch provides a framework for tracing GLES 1.0 and 2.0
functions. It is missing a lot of features, but here are the
things it accomplishes:

- Stop building the glesv2dbg library, and build the
    glestrace library instead.
- Replace the hooks for glesv2dbg with the ones for glestrace.
- Add the basics for the trace library. Currently, this
    traces all GL functions, but not all required data is
    sent for all the functions.  As a result, it will not
    be possible to reconstruct the entire GL state on the
    host side.

The files gltrace.pb.* and gltrace_api.* are both generated
using the tools/genapi.py script.

Change-Id: Id60a468f7278657f008bc6ea1df01f9bdfecfdd3
diff --git a/opengl/libs/EGL/Loader.cpp b/opengl/libs/EGL/Loader.cpp
index 325193c..8a8898b 100644
--- a/opengl/libs/EGL/Loader.cpp
+++ b/opengl/libs/EGL/Loader.cpp
@@ -28,7 +28,7 @@
 #include <EGL/egl.h>
 
 #include "egldefs.h"
-#include "glesv2dbg.h"
+#include "glestrace.h"
 #include "hooks.h"
 #include "Loader.h"
 
@@ -157,7 +157,7 @@
 
 Loader::~Loader()
 {
-    StopDebugServer();
+    GLTrace_stop();
 }
 
 const char* Loader::getTag(int dpy, int impl)