opengles Translator: Omit precision macros from shaders

The shaders fail to compile if we don't omit those changes (Cordy game for example).
Anyways, they have no semantic meaning in GLSL, quote for GLSL 4.1 spec:
"Precision qualifiers are added for code portability with OpenGL ES, not for functionality. They have the
same syntax as in OpenGL ES, as described below, but they have no semantic meaning, which includes no
effect on the precision used to store or operate on variables."
Also removed an anoying print in the encoder.

tools/emulator/opengl/system/GLESv2_enc/GL2Encoder.cpp

@@ -304,7 +304,7 @@ void GL2Encoder::s_glDrawElements(void *self, GLenum mode, GLsizei count, GLenum
                                     count * glSizeof(type));
             // XXX - OPTIMIZATION (see the other else branch) should be implemented
             if(!has_indirect_arrays) {
-                LOGD("unoptimized drawelements !!!\n");
+                //LOGD("unoptimized drawelements !!!\n");
             }
         } else {
             // we are all direct arrays and immidate mode index array -