re PR fortran/30922 (IMPORT fails for same symbol in multiple interface bodies of same interface block)

PR fortran/30922
PR fortran/30948
PR fortran/30953
* intrinsics.texi (CHDIR): Fix argument names, note
that STATUS must be a default integer.
(CTIME): Fix argument names, note that RESULT must
be a default integer.
(EXIT): Note that STATUS must be a default integer.

From-SVN: r122905