[PATCH] libtool: Ensure the paths to sed are not hardcoded

[Richard Purdie <richard.purdie@linuxfoundation.org>]

If you:

bitbake sed-native
bitbake libtool-cross

then libtool-cross has SED="/path/to/sysroot/sed" which is incorrect. If that
is reused from sstate or sed-native is cleaned, the build will fail.

This patch simply sets sed to be "sed" since we're not on systems where
the sed from PATH is broken.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/meta/recipes-devtools/libtool/libtool-2.4.2.inc b/meta/recipes-devtools/libtool/libtool-2.4.2.inc
index 95e12a2..12a783a 100644
--- a/meta/recipes-devtools/libtool/libtool-2.4.2.inc
+++ b/meta/recipes-devtools/libtool/libtool-2.4.2.inc
@@ -25,6 +25,9 @@ SRC_URI = "${GNU_MIRROR}/libtool/libtool-${PV}.tar.gz \
 SRC_URI[md5sum] = "d2f3b7d4627e69e13514a40e72a24d50"
 SRC_URI[sha256sum] = "b38de44862a987293cd3d8dfae1c409d514b6c4e794ebc93648febf9afc38918"
 
+# Don't want paths to sed-native (or anything else) encoded
+CACHED_CONFIGUREVARS += "ac_cv_path_SED=sed"
+
 do_compile_prepend () {
 	# Sometimes this file doesn't get rebuilt, force the issue
 	rm -f ${S}/libltdl/config/ltmain.sh