ccache port doesn't set itself up as gcc-4.2

[bzbarsky (Boris Zbarsky)]

The portfile for ccache has the following:

    foreach {bin} {
	    cc
	    gcc gcc2    gcc3    gcc-3.3 gcc-4.0
	    c++ c++3    c++-3.3 c++-4.0
	    g++ g++2    g++3    g++-3.3 g++-4.0
    } {
        ln -sf ${prefix}/bin/ccache ${destroot}${symlinks_dir}/${bin}
    }

At least on Leopard, it should also set up gcc-4.2 and g++-4.2.

[manphiz@…]

Proposed patch