[v2] os: unexport ForceClockId()
This function is only intented for DDX'es (currently just Xwayland) that need to force using another clock. Really shouldn't be called by drivers or extensions.
Fixes: a779fda2
Changes v2:
- include osdep.h from os/ dir instead of adding extra os/ include path
Edited by Enrico Weigelt, metux IT consult .