Added missing argument to 'find'

Author: Dylan McKay

mk/clean.mk

@@ -65,7 +65,7 @@ clean-generic-$(2)-$(1):
          -name '*.def' -o \
          -name '*.py' -o \
          -name '*.pyc' -o \
-         -name '*.bc' \
+         -name '*.bc' -o \
          -name '*.rs' \
          \) \
          | xargs rm -f