llvm-isel-fuzzer: Add link-time dependency on BitReader
llvm-isel-fuzzer: Add link-time dependency on BitReader

This should fix the undefined reference to parseBitcodeFile here:
http://bb.pgr.jp/builders/llvm-i686-linux-RA/builds/5785

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@312343 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm