autotools: Avoid find race for S = "${WORKDIR}"

For recipes with PACKAGES_remove = "${PN}", the find which removes .la files can race against deletion of other directories in WORKDIR e.g.:

find: '/home/autobuilder/yocto-autobuilder/yocto-worker/nightly-oe-selftest/build/build/tmp/work/qemux86_64-poky-linux/init-ifupdown/1.0-r7/sstate-build-populate_lic': No such file or directory | WARNING: /home/autobuilder/yocto-autobuilder/yocto-worker/nightly-oe-selftest/build/build/tmp/work/qemux86_64-poky-linux/init-ifupdown/1.0-r7/temp/run.do_configure.6558:1 exit 1 from
| find /home/autobuilder/yocto-autobuilder/yocto-worker/nightly-oe-selftest/build/build/tmp/work/qemux86_64-poky-linux/init-ifupdown/1.0-r7 -name \*.la -delete

The simplest fix is to add the find option which ignores these kind of races.

[YOCTO #7522]

index f44b9eb..19c1091 100644
@@ -88,7 +88,7 @@ oe_runconf () {
 		${CACHED_CONFIGUREVARS} $cfgscript ${CONFIGUREOPTS} ${EXTRA_OECONF} "$@"
 		if [ "$?" != "0" ]; then
 			echo "Configure failed. The contents of all config.log files follows to aid debugging"
-			find ${S} -name config.log -print -exec cat {} \;
+			find ${S} -ignore_readdir_race -name config.log -print -exec cat {} \;
 			bbfatal "oe_runconf failed"
 		fi
 		set -e