[client] all: add screen rotation support win:rotate

Currently only supports EGL, if there is enough demand for OpenGL
support this can be added later.

Closes #231

client/src/main.c

@@ -379,6 +379,7 @@ static int cursorThread(void * unused)
         cursorType,
         cursor->width,
         cursor->height,
+        params.winRotate,
         cursor->pitch,
         data)
       )
@@ -558,6 +559,8 @@ static int frameThread(void * unused)
           frame->width, frame->height,
           frame->stride, frame->pitch);
 
+      lgrFormat.rotate = params.winRotate;
+
       if (!g_state.lgr->on_frame_format(g_state.lgrData, lgrFormat, useDMA))
       {
         DEBUG_ERROR("renderer failed to configure format");