rsync: Fix case where ${B} != ${S}

Allow out of tree builds to work by removing assumptions about cwd.

(From OE-Core rev: f265de26fcde98cdc7a8e4bfec777888a216ff8c)

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

meta/recipes-devtools/rsync/rsync_3.0.9.bb

@@ -12,7 +12,7 @@ EXTRA_OECONF += "--disable-xattr-support --disable-acl-support"
 # rsync 3.0 uses configure.sh instead of configure, and
 # makefile checks the existence of configure.sh
 do_configure_prepend () {
-	rm -f configure configure.sh
+	rm -f ${S}/configure ${S}/configure.sh
 	cp -f ${WORKDIR}/acinclude.m4 ${S}/
 
 	# by default, if crosscompiling, rsync                                                           
@@ -23,5 +23,5 @@ do_configure_prepend () {
 }
 
 do_configure_append () {
-	cp -f configure configure.sh
+	cp -f ${S}/configure ${S}/configure.sh
 }