For PR432: Rework the CFE build details to include the directions for using the option --program-prefix=llvm- to the CFE's configure script. This ensures that the CFE builds unique executable names and makes it possible to put the $CFEINSTALL/bin directory into one's path.
For PR432:
Rework the CFE build details to include the directions for using the
option --program-prefix=llvm- to the CFE's configure script. This ensures
that the CFE builds unique executable names and makes it possible to put
the $CFEINSTALL/bin directory into one's path.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@19099 91177308-0d34-0410-b5e6-96231b3b80d8

GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,dslab-epfl/asap,dslab-epfl/asap,apple/swift-llvm,apple/swift-llvm,chubbymaggie/asap,chubbymaggie/asap,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,dslab-epfl/asap,apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,dslab-epfl/asap,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,dslab-epfl/asap,apple/swift-llvm,chubbymaggie/asap,chubbymaggie/asap,GPUOpen-Drivers/llvm,chubbymaggie/asap,llvm-mirror/llvm,dslab-epfl/asap,apple/swift-llvm,apple/swift-llvm,dslab-epfl/asap,llvm-mirror/llvm,llvm-mirror/llvm,chubbymaggie/asap,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm