Remove simple-raytracer too in clean_all.sh

Author: bjorn3

clean_all.sh

@@ -2,4 +2,4 @@
 set -e
 
 rm -rf target/ build_sysroot/{sysroot/,sysroot_src/,target/,Cargo.lock} perf.data{,.old}
-rm -rf regex/
+rm -rf regex/ simple-raytracer/