Bridging Minix & llvm-apps repos for instrumentating Minix

Allows instrumentation of Minix components using LLVM passes from
"llvm-apps" repository

In addition, the change does the following:
1. M

Bridging Minix & llvm-apps repos for instrumentating Minix

Allows instrumentation of Minix components using LLVM passes from
"llvm-apps" repository

In addition, the change does the following:
1. Move releasetools/generate_gold_plugin.sh to minix/llvm
2. Move external/bsd/llvm/passes to minix/llvm/passes
3. libLTO.so, LLVMgold.so and WeakAliasModuleOverride.so files
now get installed in minix/llvm/bin

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