Squashed 'toolchain/make/' changes from 26a9c98..ebf9a3b

ebf9a3b Merge branch 'master' of https://github.com/ferraith/toolchain_make
d5d64c5 Renamed C++ compile variables from CPP to CXX
466b900 Removed Crossworks C++ Standard Library from build process
6fb39ec Fixed two merge bugs in makefiles
e6fc14c Fixed rules.mk merge conflict

git-subtree-dir: toolchain/make
git-subtree-split: ebf9a3b64737b554e911bb5dee82537c829ce2be
Merge commit '226fc2cf7df908accd0957d2f629c11e3552b3fd'