Creating the pipe fails when sandboxed. This caused us to not start
the OfficeIPCThread, and that then meant that the file open requests
coming in through VCL_NSApplication's application:openFile: method in
vclnsapp.mm were not processed properly.

The OS takes care of not starting multiple LO apps simultaneously
anyway, so we don't really need any pipe, I hope.

Conflicts:
	desktop/source/app/officeipcthread.cxx

Change-Id: Ia920520ce2928787313f83199028f9c9942f61f3
(cherry picked from commit e2f4c9ea)