autoconf: upgrade from 2.65 to 2.68

And rebase the patches to the newer code.

(From OE-Core rev: aa24c1eda4b33b329d330c8bbb6d243dfd924f62)

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/autoconf/autoconf/fix_path_xtra.patch

@@ -0,0 +1,120 @@
+Upstream-Status: Pending
+
+We don't build xmkmf so any values returned from it are going to be wrong.
+Using any paths in /usr/ for x headers/libs is a bad idea when cross compiling.
+This patch removes them to stop any confusion.
+
+RP - 20071115
+
+Index: autoconf-2.68/lib/autoconf/libs.m4
+===================================================================
+--- autoconf-2.68.orig/lib/autoconf/libs.m4
++++ autoconf-2.68/lib/autoconf/libs.m4
+@@ -159,53 +159,6 @@ m4_popdef([AC_Lib_Name])dnl
+ # --------------------- #
+ 
+ 
+-# _AC_PATH_X_XMKMF
+-# ----------------
+-# Internal subroutine of _AC_PATH_X.
+-# Set ac_x_includes and/or ac_x_libraries.
+-m4_define([_AC_PATH_X_XMKMF],
+-[AC_ARG_VAR(XMKMF, [Path to xmkmf, Makefile generator for X Window System])dnl
+-rm -f -r conftest.dir
+-if mkdir conftest.dir; then
+-  cd conftest.dir
+-  cat >Imakefile <<'_ACEOF'
+-incroot:
+-	@echo incroot='${INCROOT}'
+-usrlibdir:
+-	@echo usrlibdir='${USRLIBDIR}'
+-libdir:
+-	@echo libdir='${LIBDIR}'
+-_ACEOF
+-  if (export CC; ${XMKMF-xmkmf}) >/dev/null 2>/dev/null && test -f Makefile; then
+-    # GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
+-    for ac_var in incroot usrlibdir libdir; do
+-      eval "ac_im_$ac_var=\`\${MAKE-make} $ac_var 2>/dev/null | sed -n 's/^$ac_var=//p'\`"
+-    done
+-    # Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
+-    for ac_extension in a so sl dylib la dll; do
+-      if test ! -f "$ac_im_usrlibdir/libX11.$ac_extension" &&
+-	 test -f "$ac_im_libdir/libX11.$ac_extension"; then
+-	ac_im_usrlibdir=$ac_im_libdir; break
+-      fi
+-    done
+-    # Screen out bogus values from the imake configuration.  They are
+-    # bogus both because they are the default anyway, and because
+-    # using them would break gcc on systems where it needs fixed includes.
+-    case $ac_im_incroot in
+-	/usr/include) ac_x_includes= ;;
+-	*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes=$ac_im_incroot;;
+-    esac
+-    case $ac_im_usrlibdir in
+-	/usr/lib | /usr/lib64 | /lib | /lib64) ;;
+-	*) test -d "$ac_im_usrlibdir" && ac_x_libraries=$ac_im_usrlibdir ;;
+-    esac
+-  fi
+-  cd ..
+-  rm -f -r conftest.dir
+-fi
+-])# _AC_PATH_X_XMKMF
+-
+-
+ # _AC_PATH_X_DIRECT
+ # -----------------
+ # Internal subroutine of _AC_PATH_X.
+@@ -213,44 +166,7 @@ fi
+ m4_define([_AC_PATH_X_DIRECT],
+ [# Standard set of common directories for X headers.
+ # Check X11 before X11Rn because it is often a symlink to the current release.
+-ac_x_header_dirs='
+-/usr/X11/include
+-/usr/X11R7/include
+-/usr/X11R6/include
+-/usr/X11R5/include
+-/usr/X11R4/include
+-
+-/usr/include/X11
+-/usr/include/X11R7
+-/usr/include/X11R6
+-/usr/include/X11R5
+-/usr/include/X11R4
+-
+-/usr/local/X11/include
+-/usr/local/X11R7/include
+-/usr/local/X11R6/include
+-/usr/local/X11R5/include
+-/usr/local/X11R4/include
+-
+-/usr/local/include/X11
+-/usr/local/include/X11R7
+-/usr/local/include/X11R6
+-/usr/local/include/X11R5
+-/usr/local/include/X11R4
+-
+-/usr/X386/include
+-/usr/x386/include
+-/usr/XFree86/include/X11
+-
+-/usr/include
+-/usr/local/include
+-/usr/unsupported/include
+-/usr/athena/include
+-/usr/local/x11r5/include
+-/usr/lpp/Xamples/include
+-
+-/usr/openwin/include
+-/usr/openwin/share/include'
++ac_x_header_dirs=''
+ 
+ if test "$ac_x_includes" = no; then
+   # Guess where to find include files, by looking for Xlib.h.
+@@ -299,7 +215,6 @@ AC_DEFUN([_AC_PATH_X],
+ [AC_CACHE_VAL(ac_cv_have_x,
+ [# One or both of the vars are not set, and there is no cached value.
+ ac_x_includes=no ac_x_libraries=no
+-_AC_PATH_X_XMKMF
+ _AC_PATH_X_DIRECT
+ case $ac_x_includes,$ac_x_libraries in #(
+   no,* | *,no | *\'*)