[jit] Merger of trunk r216524 into jit branch

I've merged svn trunk into the git dmalcolm/jit branch, specifically from trunk r216746 aka fddbd0194b01f44c5b5f16379fd5405dcf6d71c0 (2014-10-27) bringing in all changes since r216524 aka d14cac46135326115f0dc589b0b3d2d249d74cf7 (2014-10-21). Some #include fixups were needed within gcc/jit to trac

[jit] Merger of trunk r216524 into jit branch

I've merged svn trunk into the git dmalcolm/jit branch, specifically from trunk r216524 aka d14cac46135326115f0dc589b0b3d2d249d74cf7 (2014-10-21) bringing in all changes since r215958 aka e012cdc775868e9922f5fef9068a764546876d93 (2014-10-06). This required a cleanup of global state "optimizer" in