base: Avoid find race

In a similar way to http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=aa1438b56f30515f9c31b306decef7f562dda81f
and http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=527b28c10955daf0387597020d69593ce24bcaa4
there is a find race in base.bbclass.

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

Fix the race in the same way.

[YOCTO #7522]

index 0e4b068..99b512b 100644
@@ -269,7 +269,7 @@ base_do_configure() {
 			if [ "${CLEANBROKEN}" != "1" -a \( -e Makefile -o -e makefile -o -e GNUmakefile \) ]; then
 				oe_runmake clean
 			fi
-			find ${B} -name \*.la -delete
+			find ${B} -ignore_readdir_race -name \*.la -delete
 		fi
 	fi
 	if [ -n "${CONFIGURESTAMPFILE}" ]; then