compiler, linker, and installer interfaces may be implemented by a
single decorator object, rename their methods to be unique to avoid the
same method being called multiple times.
Test: out/soong/build.ninja unchanged
Change-Id: I1608c41cd68f614ba99c11bb9fcc7936f618d9aa
Split cc.go into files per module type, plus files for the compiler,
linker, and installer stages.
Change-Id: Id44c03f42fcd180950ccd008d4de0c144ea3597b
