Swap channels for cairo surfaces sent to GL Textures (WayfireWM#816)

* Swap channels for cairo surfaces sent to GL Textures

Intended fix for WayfireWM#807 . 

Compiled and tested on intel gfx with no side effects.

* Removed unneeded assignments

plugins/common/wayfire/plugins/common/cairo-util.hpp

@@ -29,6 +29,8 @@ static void cairo_surface_upload_to_texture(
     GL_CALL(glBindTexture(GL_TEXTURE_2D, buffer.tex));
     GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
     GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
+    GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_R, GL_BLUE));
+    GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_B, GL_RED));
     GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
         buffer.width, buffer.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, src));
 }