fondu fails on newer OS X versions

[Mats Behre]

% fondu fails on newer OS X versions (probably 10.7 Lion and later) for fonts 
containing
% resource forks.
% There is no such font by default in the system, so you have to add one and 
replace Textile
% in the example with the name of that font.

\version "2.18.2"

\header {
  composer = \markup  \right-align { \override #'(font-name . "Textile") 
"Rodgers/Hart" }
}

{
  c''4
}

% For some reason fondu also fails (on the same systems) for at least some 
.dfont files
% Times is part of the system so this example should work as it is.
% (If you keep this part the example above won't be compiled, so you can't see 
that error.)

\version "2.18.2"

\header {
  composer = \markup  \right-align { \override #'(font-name . "Times") 
"Rodgers/Hart" }
}

{
  c''4
}

% Both of these problems can be solved by changing the string appended to the 
file name by the fondu.c
% HasResourceFork function from "rsrc" to "/..namedfork/rsrc", but this code 
also exists in other programs
% of the fondu set.
% To be able to compile on newer OS X versions (at least 10.11 El Capitan) you 
also need to change
% the include path in Makefile.Mac from /Developer/Headers/FlatCarbon/ to
% /System/Library/Frameworks/CoreServices.framework/Headers