String::ToWideString wasn't returning a wide string...!

Enabled wide strings for Android ( i'll never target Android < 2.3 ).
EE_MAIN_FUNC is back, it was needed for the Android build ( i forgot about it ).

src/examples/external_shader/external_shader.cpp

@@ -81,7 +81,7 @@ void videoResize( cWindow * w ) {
 }
 using namespace Demo_ExternalShader;
 
-int main (int argc, char * argv [])
+EE_MAIN_FUNC int main (int argc, char * argv [])
 {
 	win = cEngine::instance()->CreateWindow( WindowSettings( 960, 640, "eepp - External Shaders" ), ContextSettings( true ) );