[reclient] Fix up reclient nacl wrapper config.

Similar to crrev.com/c/2860469, but fixes inputs for nacl actions.

Bug: None
Change-Id: I12752e957e08bdc9acde011a3dd0cc6635d704ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2868332
Commit-Queue: Dirk Pranke <dpranke@google.com>
Auto-Submit: Michael Savigny <msavigny@google.com>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#878609}

buildtools/reclient_cfgs/rewrapper_linux_nacl.cfg

@@ -2,4 +2,4 @@ platform=container-image=docker://gcr.io/cloud-marketplace/google/rbe-ubuntu16-0
 server_address=unix:///tmp/reproxy.sock
 labels=type=compile,compiler=nacl,lang=cpp
 exec_strategy=remote_local_fallback
-inputs=third_party/llvm-build/Release+Asserts,native_client/toolchain/linux_x86/pnacl_newlib
+inputs=third_party/llvm-build/Release+Asserts/bin/clang,third_party/llvm-build/Release+Asserts/bin/clang++,third_party/llvm-build/Release+Asserts/bin/clang-cl,third_party/llvm-build/Release+Asserts/lib/libstdc++.so.6,native_client/toolchain/linux_x86/pnacl_newlib