libtool: Use SYSROOT_DIRS_BLACKLIST to exclude dirs from the sysroot

(From OE-Core rev: 83cdfd77b1b48f2bd648d3a5991eadb7f01f647e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/libtool/libtool_2.4.6.bb

@@ -5,7 +5,11 @@ RDEPENDS_${PN} += "bash"
 #
 # We want the results of libtool-cross preserved - don't stage anything ourselves.
 #
-SYSROOT_PREPROCESS_FUNCS += "libtool_sysroot_preprocess"
+SYSROOT_DIRS_BLACKLIST += " \
+    ${bindir} \
+    ${datadir}/aclocal \
+    ${datadir}/libtool/build-aux \
+"
 
 do_install_append () {
         sed -e 's@--sysroot=${STAGING_DIR_HOST}@@g' \
@@ -18,10 +22,3 @@ do_install_append () {
             -e 's@^\(postdep_objects="\).*@\1"@' \
             -i ${D}${bindir}/libtool
 }
-
-libtool_sysroot_preprocess () {
-	rm -rf ${SYSROOT_DESTDIR}${bindir}/*
-	rm -rf ${SYSROOT_DESTDIR}${datadir}/aclocal/*
-	rm -rf ${SYSROOT_DESTDIR}${datadir}/libtool/build-aux/*
-}
-