gmmproc: _WRAP_SIGNAL: Accept apostrophes in a preceding comment
gmmproc: _WRAP_SIGNAL: Accept apostrophes in a preceding comment

* tools/pm/Output.pm: If a _WRAP_SIGNAL() is preceded by a Doxygen comment,
add enough m4 quotes to the comment in the call to _SIGNAL_PROXY().
If not, the generated code is wrong if the comment contains an apostrophe.
This bug was probably introduced when I added support for detail_name.

GNOME/glibmm,GNOME/glibmm,GNOME/glibmm,johne53/MB3Glibmm,GNOME/glibmm,johne53/MB3Glibmm,GNOME/glibmm,johne53/MB3Glibmm,johne53/MB3Glibmm