add more mgcp crxc error counters

Add counters for error conditions which I overlooked in
commit 1e174875bf72c3d7840fa98cfad8c410a542919e

Change-Id: Ia2004f8063f3a50b5d7a838ebe8a784a47fcc50d
Depends: If4f097c5e441914eaa24c7657813ebb3f9a49916
Related: OS#2660
2 files changed