Include file:line in ceph debug output

configname: CONFIG_CEPH_LIB_PRETTYDEBUG

Linux Kernel Configuration
└─>Networking support
└─>Include file:line in ceph debug output
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
If you say Y here, debug output will include a filename and
line to aid debugging. This increases kernel size and slows
execution slightly when debug call sites are enabled (e.g.,
via CONFIG_DYNAMIC_DEBUG).

If unsure, say N.