[clang] [Driver] Warn when using msan on Android (PR #122540)

[Sharjeel Khan via cfe-commits]

Sharjeel-Khan wrote:

I can do it by moving these checks into Toolchains/Linux.cpp so it triggers that code: https://github.com/llvm/llvm-project/blob/2914ba1c01fdc496082197abf7cd35e2af526634/clang/lib/Driver/ToolChains/Linux.cpp#L809-L865.
Is this a good solution?

https://github.com/llvm/llvm-project/pull/122540