openjade @1.3.2 clang fails, use llvm-gcc-4.2 instead, and also support +universal

[fgp (Florian G. Pflug)]

XCode 4.2's clang fails to build openjade, but llvm-gcc-4.2 works. Also, universal builds don't work because libtool doesn't use the magic "-arch ..." incantations when invoking the compiler.

(More generally, i386 builds fail on machines where x86_64 is the default. Thus, putting openjade into the muniversal portgroup doesn't fix the problems with +universal)

I've fixed both problems by

• Setting configure.compiler to llvm-gcc-4.2 if it's set to clang
• Using reinplace to patch libtool's CC and CXX settings

Patch for the Portfile is attached.