json-c: do rm -f on config.status before do_configure

This change adds -f when doing rm on config.status. .config.status is
not always present when doing do_configure, and that would without this
change lead to a fatal error.

(From OE-Core rev: b16d312ce03ae68da46ead3fc855b5879b2013fd)

Signed-off-by: Olof Johansson <olof.johansson@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/json-c/json-c_0.11.bb

@@ -16,5 +16,5 @@ inherit autotools
 
 do_configure_prepend() {
     # Clean up autoconf cruft that should not be in the tarball
-    rm ${S}/config.status
+    rm -f ${S}/config.status
 }