[Bug driver/19541] need another option to support what -I- did just besides -iquote

[achurch+gcc at achurch dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19541

--- Comment #27 from Andrew Church <achurch+gcc at achurch dot org> ---
I've updated the undeprecation patch at http://achurch.org/patch-pile/#gcc for
4.9.4 and 6.2.0 (sorry about laziness).

I'm mildly amused at how the quotation style ('...' vs `...') and line wrap
column in the pregenerated info files varies more or less randomly between
versions.  It certainly makes updating the patch an interesting task...