error Generating precompiled header precompiled.hpp.gch for mlvm8

[Stephen Bannasch]

My build of mlvm is breaking when it starts generating precompiled header precompiled.hpp.gch

   https://gist.github.com/2217352

Building on 10.6.8 using 1.7.0_04 for ALT_BOOTDIR to build.

I can successfully build and test jdk8/tl in this environment.

mlvm build script: https://gist.github.com/243072