preprocessor/4917: Make -print-search-dirs show include dirs

[neil@gcc.gnu.org]

Synopsis: Make -print-search-dirs show include dirs

State-Changed-From-To: open->feedback
State-Changed-By: neil
State-Changed-When: Tue Aug 20 15:40:51 2002
State-Changed-Why:
    This might be made possible by changes I plan in GCC 3.4, but no promises.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4917