llvm-nm and llvm-objcopy belong to toolchain

[jiangyi]

Ping. Does anyone have permission to commit this?

[alexander-shaposhnikov]

1. patches which are meant to be sent for code review should include "full context" https://llvm.org/docs/Phabricator.html
2. I think it'd be useful to flash out the description of this change (why you are changing this / what does this fix, even if the change is small)

my understanding is that you are trying to change LLVM_TOOLCHAIN_TOOLS - is it correct ?

3. I will add one more reviewer to have a look at this diff (just in case).

[compnerd]

SVN r362425

cmake/modules/AddLLVM.cmake

     llvm-ar
     llvm-ranlib
     llvm-lib
+    llvm-nm
+    llvm-objcopy
     llvm-objdump
     llvm-rc
     )