Building on Mac OS X 10.7

[Tor Lillqvist]

I still don't understand how you managed to build against the 10.7 SDK
without getting undefined errors for FMGetATSFontRefFromFont() and
KillPicture(). These two functions are not declared in the 10.7 (or
10.8) SDK headers. (They are still present in the respective
frameworks (libraries).) I had to add the declarations "manually" to
get LO to compile against the 10.8 SDK.

--tml