[Bug other/18555] -isysroot is not miss-documented

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|enhancement                 |minor
  GCC build triplet|powerpc-apple-darwin7       |
   GCC host triplet|powerpc-apple-darwin7       |
 GCC target triplet|powerpc-apple-darwin7       |*-*-darwin*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18555