Cleaning up the serialization change.
Renaming the define to be more in line with what it does and removing the host stub header file.

Change-Id: Ibd3a0a6a398c7f81cc661f71e4478707fe1679ed
diff --git a/libs/rs/rsMesh.cpp b/libs/rs/rsMesh.cpp
index 8cf76e5..76fe62d 100644
--- a/libs/rs/rsMesh.cpp
+++ b/libs/rs/rsMesh.cpp
@@ -14,14 +14,11 @@
  * limitations under the License.
  */
 
-#ifndef ANDROID_RS_BUILD_FOR_HOST
 #include "rsContext.h"
-
+#ifndef ANDROID_RS_SERIALIZE
 #include <GLES/gl.h>
 #include <GLES2/gl2.h>
 #include <GLES/glext.h>
-#else
-#include "rsContextHostStub.h"
 #endif
 
 using namespace android;
@@ -33,7 +30,7 @@
     mVertexBuffers = NULL;
     mVertexBufferCount = 0;
 
-#ifndef ANDROID_RS_BUILD_FOR_HOST
+#ifndef ANDROID_RS_SERIALIZE
     mAttribs = NULL;
     mAttribAllocationIndex = NULL;
 
@@ -53,7 +50,7 @@
         delete[] mPrimitives;
     }
 
-#ifndef ANDROID_RS_BUILD_FOR_HOST
+#ifndef ANDROID_RS_SERIALIZE
     if (mAttribs) {
         delete[] mAttribs;
         delete[] mAttribAllocationIndex;
@@ -134,7 +131,7 @@
         }
     }
 
-#ifndef ANDROID_RS_BUILD_FOR_HOST
+#ifndef ANDROID_RS_SERIALIZE
     mesh->updateGLPrimitives();
     mesh->initVertexAttribs();
     mesh->uploadAll(rsc);
@@ -142,7 +139,7 @@
     return mesh;
 }
 
-#ifndef ANDROID_RS_BUILD_FOR_HOST
+#ifndef ANDROID_RS_SERIALIZE
 
 bool Mesh::isValidGLComponent(const Element *elem, uint32_t fieldIdx) {
     // Do not create attribs for padding