Change Details

**Warning: to be commited on "flag day", so marking as "Plan Changes"** This enables LLVM as default toolchain/compiler/linker for PowerPC64 platform.

**Warning: to be commited on "flag day", so marking as "Plan Changes"** This enables LLVM as default toolchain/compiler/linker for PowerPC and PowerPC64 platforms.

**Warning: to be commited on "flag day", so marking as "Plan Changes"** This enables LLVM as default toolchain/compiler/linker for PowerPC and PowerPC64 platforms.