Automatic update of common submodule

From 01a7a46 to 74a6857
Automatic update of common submodule

From 74a6857 to b613661
Automatic update of common submodule

From b613661 to 6b03ba7
Automatic update of common submodule

From 6b03ba7 to 865aa20
tests: update for GstGLContext addition
move the GL vtable from GstGLDisplay to GstGLContext
unref the pool on shutdown
mixer: timestamp buffers
fix some refcount errors
x11: fix make check segfault
make the state change test pass
window: add send_message_async vmethod

- provide a default synchronous send_message
- make context creation threadsafe again