Fix up configure so it finds mkinstalldirs

As an object lesson in why autoreconf is fundamentally unsafe, the
newer version of nls.m4 no longer handles @MKINSTALLDIRS@.  So add
this back, since our Makefiles depend on it.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

acinclude.m4

@@ -128,3 +128,21 @@ dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, '#' ot
         AC_SUBST(ifGNUmake)
         AC_SUBST(ifNotGNUmake)
 ] )
+# was originally from nls.m4 serial 1 (gettext-0.12)
+AC_DEFUN([AM_MKINSTALLDIRS],
+[
+  dnl If the AC_CONFIG_AUX_DIR macro for autoconf is used we possibly
+  dnl find the mkinstalldirs script in another subdir but $(top_srcdir).
+  dnl Try to locate it.
+  MKINSTALLDIRS=
+  if test -n "$ac_aux_dir"; then
+    case "$ac_aux_dir" in
+      /*) MKINSTALLDIRS="$ac_aux_dir/mkinstalldirs" ;;
+      *) MKINSTALLDIRS="\$(top_builddir)/$ac_aux_dir/mkinstalldirs" ;;
+    esac
+  fi
+  if test -z "$MKINSTALLDIRS"; then
+    MKINSTALLDIRS="\$(top_srcdir)/mkinstalldirs"
+  fi
+  AC_SUBST(MKINSTALLDIRS)
+])

configure

@@ -627,6 +627,7 @@ ac_subst_vars='LTLIBOBJS
 LIBOBJS
 BUILD_LDFLAGS
 BUILD_CFLAGS
+MKINSTALLDIRS
 INCLUDES
 DO_TEST_SUITE
 ET_DIR
@@ -13386,6 +13387,19 @@ if test -n "$WITH_DIET_LIBC" ; then
 	INCLUDES="$INCLUDES -D_REENTRANT"
 fi
 
+
+        MKINSTALLDIRS=
+  if test -n "$ac_aux_dir"; then
+    case "$ac_aux_dir" in
+      /*) MKINSTALLDIRS="$ac_aux_dir/mkinstalldirs" ;;
+      *) MKINSTALLDIRS="\$(top_builddir)/$ac_aux_dir/mkinstalldirs" ;;
+    esac
+  fi
+  if test -z "$MKINSTALLDIRS"; then
+    MKINSTALLDIRS="\$(top_srcdir)/mkinstalldirs"
+  fi
+
+
 if test $cross_compiling = no; then
    BUILD_CFLAGS="$CFLAGS $CPPFLAGS $INCLUDES -DHAVE_CONFIG_H"
    BUILD_LDFLAGS="$LDFLAGS"

configure.in

@@ -1295,6 +1295,7 @@ if test -n "$WITH_DIET_LIBC" ; then
 	INCLUDES="$INCLUDES -D_REENTRANT"
 fi
 AC_SUBST(INCLUDES)
+AM_MKINSTALLDIRS
 dnl
 dnl Build CFLAGS
 dnl