libtool: remove build host paths from installed libtool

Resulted libtool contains references about paths from the build host

Below variables contains hard coded build paths from the host:
LTCC=
lt_sysroot=
sys_lib_search_path_spec=
LD=
CC=
compiler_lib_search_dirs=
predep_objects=
postdep_objects=
compiler_lib_search_path=

(From OE-Core rev: d27c4226f600584f83f66c86b0988a165e8ecb75)

Signed-off-by: Shiqun Lin <Shiqun.Lin@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/libtool/libtool_2.4.2.bb

@@ -9,6 +9,17 @@ RDEPENDS_${PN} += "bash"
 #
 SYSROOT_PREPROCESS_FUNCS += "libtool_sysroot_preprocess"
 
+do_install_append () {
+        sed -e 's@--sysroot=${STAGING_DIR_HOST}@@g' \
+            -e 's@${STAGING_DIR_HOST}@@g' \
+            -e 's@^\(sys_lib_search_path_spec="\).*@\1${libdir} ${base_libdir}"@' \
+            -e 's@^\(compiler_lib_search_dirs="\).*@\1${libdir} ${base_libdir}"@' \
+            -e 's@^\(compiler_lib_search_path="\).*@\1${libdir} ${base_libdir}"@' \
+            -e 's@^\(predep_objects="\).*@\1"@' \
+            -e 's@^\(postdep_objects="\).*@\1"@' \
+            -i ${D}${bindir}/libtool
+}
+
 libtool_sysroot_preprocess () {
 	rm -rf ${SYSROOT_DESTDIR}${bindir}/*
 	rm -rf ${SYSROOT_DESTDIR}${datadir}/aclocal/*