MiG and -isystem

[Alfred M. Szmidt]

I see no problems with the following patch, OK to commit?

(but my purposed patch is more correct, though it has the major draw
back of breaking everything)

2005-04-09  Thomas Schwinge  <schwinge@nic-nac-project.de>

        * mig.in: Handle the preprocessor option '-isystem ...' correctly.

--- mig.in.orig 2005-04-09 12:58:11.000000000 +0200
+++ mig.in      2005-04-09 13:01:30.000000000 +0200
@@ -93,7 +93,7 @@
        -prefix | -subrprefix ) migflags="$migflags $1 $2"; shift; shift;;
 
        -MD ) sawMD=1; cppflags="$cppflags $1"; shift;;
-       -imacros ) cppflags="$cppflags $1 $2"; shift; shift;;
+       -imacros | -isystem ) cppflags="$cppflags $1 $2"; shift; shift;;
        -cc) cpp="$2"; shift; shift;;
        -migcom) migcom="$2"; shift; shift;;
        -* ) cppflags="$cppflags $1"; shift;;