[PECOFF] Do not accept "/include <string>" option.
[PECOFF] Do not accept "/include <string>" option.

Command line argument separator on Windows is colon. We used to accept space
as a separator, but we removed most of the code for that. This patch is to
delete the remaining code.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@198032 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld