Compiler: support "OPT_ATT_NORMAL" flags when an empty set of flags is defined in order to reset the flags on an attribute. Useful for inherited flags.
Compiler: support "OPT_ATT_NORMAL" flags when an empty set of flags is defined in order to reset the flags on an attribute. Useful for inherited flags.

ucbpi/itop,ucbpi/itop,ucbpi/itop,ucbpi/itop,ucbpi/itop