Drop the latest prebuilt llvm-rs-cc.

Change-Id: I76a3d7c5608a5e296e276052584a0eed79e415eb
diff --git a/tools/darwin/llvm-rs-cc b/tools/darwin/llvm-rs-cc
index e77b507..a44b92d 100755
--- a/tools/darwin/llvm-rs-cc
+++ b/tools/darwin/llvm-rs-cc
Binary files differ
diff --git a/tools/linux/llvm-rs-cc b/tools/linux/llvm-rs-cc
index 7af9a49..6aa7641 100755
--- a/tools/linux/llvm-rs-cc
+++ b/tools/linux/llvm-rs-cc
Binary files differ