The cairo-missing library provides the functions which are needed in
order to correctly compile cairo (or its utilities) and which were not
found during configuration.

Fixes the build on MacOS X Lion, which failed because of collisons
between the cairo internal getline and strndup and those in libc:

cairo-analyse-trace.c:282: error: static declaration of ‘getline’ follows non-static declaration
/usr/include/stdio.h:449: error: previous declaration of ‘getline’ was here
cairo-analyse-trace.c:307: error: static declaration of ‘strndup’ follows non-static declaration
...