missing requirements in _LT_SYS_DYNAMIC_LINKER

[Ralf Wildenhues]

The subproject tests revealed that _LT_SYS_DYNAMIC_LINKER has not listed
all required macros:

| checking dynamic linker characteristics... ./configure: line 4668: -e: 
command not found
| ./configure: line 4676: -e: command not found
| no
| checking which extension is used for runtime loadable modules... .so
| checking which variable specifies run-time module search path...
| checking for the default library search path... /lib /usr/lib

(the last lines is bogus as well -- the path should be much longer)

This patch seems to fix it.  OK to apply?

Cheers,
Ralf

        * libltdl/m4/libtool.m4 (_LT_SYS_DYNAMIC_LINKER): Require
        AC_CANONICAL_HOST and _LT_DECL_SED.

Index: libltdl/m4/libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/libltdl/m4/libtool.m4,v
retrieving revision 1.23
diff -u -r1.23 libtool.m4
--- libltdl/m4/libtool.m4       23 Sep 2005 10:33:34 -0000      1.23
+++ libltdl/m4/libtool.m4       30 Sep 2005 10:11:16 -0000
@@ -1830,8 +1830,10 @@
 # -----------------------------
 # PORTME Fill in your ld.so characteristics
 m4_defun([_LT_SYS_DYNAMIC_LINKER],
-[m4_require([_LT_DECL_EGREP])dnl
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+m4_require([_LT_DECL_EGREP])dnl
 m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_SED])dnl
 AC_MSG_CHECKING([dynamic linker characteristics])
 m4_case([$1],
        [C], [withGCC=$GCC],