Name the namespaces logically.

BUG=18110152

Change-Id: Ib9959d5a3d993048e61887254f42e7de342ec4fd
Reviewed-on: https://swiftshader-review.googlesource.com/1255
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>

src/GLES2/libGLES_CM/mathutil.h

diff --git a/src/GLES2/libGLES_CM/mathutil.h b/src/GLES2/libGLES_CM/mathutil.h
index 61cbac9..8f93020 100644
--- a/src/GLES2/libGLES_CM/mathutil.h
+++ b/src/GLES2/libGLES_CM/mathutil.h
@@ -18,7 +18,7 @@
 
 #include <math.h>
 
-namespace gl
+namespace es1
 {
 inline bool isPow2(int x)
 {