Remove broken command to copy tblgen tool.
Remove broken command to copy tblgen tool.

tblgen has been renamed to llvm-tblgen so this command has been failing,
and it's no longer needed because llvm-tblgen is already installed by default.

git-svn-id: a4a6f32337ebd29ad4763b423022f00f68d1c7b7@147187 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx