No longer build the objective-C compiler (cc1obj). Its standard library
(libobjc) had been removed from the build years ago, there is no need to
keep the compiler.
ok beck@ joshua@

build cpp on gcc4 architectures only, as clang ships with its own

ok naddy@

Build and install libgcov on gcc 4 platforms. Build machinery from FreeBSD.
This makes gcc -fprofile-arcs work again.

Regression reported by Azwaw OUSADOU on tech@, thanks for noticing and sorry
for

Build and install libgcov on gcc 4 platforms. Build machinery from FreeBSD.
This makes gcc -fprofile-arcs work again.

Regression reported by Azwaw OUSADOU on tech@, thanks for noticing and sorry
for the delay fixing this.

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Import a BSD make based infrastructure for building gcc, based on the
same solution from FreeBSD.
Don't even try to build it at the moment. This is commited so people can
work on it in tree.