(${etc}DOC): Re-add a ${EXEEXT} which seems to have been

removed by mistake on the multi-tty branch.

src/Makefile.in

@@ -995,7 +995,7 @@ emacs${EXEEXT}: temacs${EXEEXT} ${etc}DOC ${lisp}
    for the first time, this prevents any variation between configurations
    in the contents of the DOC file.
    Likewise for ${SOME_MACHINE_LISP}.  */
-${etc}DOC: ${libsrc}make-docfile ${obj} ${shortlisp} ${SOME_MACHINE_LISP}
+${etc}DOC: ${libsrc}make-docfile${EXEEXT} ${obj} ${shortlisp} ${SOME_MACHINE_LISP}
 	-rm -f ${etc}DOC
 	${libsrc}make-docfile -d ${srcdir} ${SOME_MACHINE_OBJECTS} ${obj} > ${etc}DOC
 	${libsrc}make-docfile -a ${etc}DOC -d ${srcdir} ${SOME_MACHINE_LISP} ${shortlisp}