[LLVMdev] make error building llvm/clang 3.2 on Linux

[Michael Young]

Following up just in case anyone is looking at this in the future in an attempt to solve a similar issue.
I can now successfully build gcc-4.8.0 (and llvm/compiler-rt/clang/test-suite 3.2) on Ubuntu 12.04 (x86, 32-bit, desktop edition) without setting any environment variables (C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, LIBRARY_PATH).  So the ideal solution is to not use a locally built gcc-4.7 on Ubuntu 12.04, especially to build LLVM 3.2.
  - Michael