For "$obj->{__FUNCTION__}" and "$obj->{__CLASS__}", we currently don't
recognize __FUNCTION__ and __CLASS__ as "magic constants" and we just use
the literal strings "__FUNCTION__" and "__CLASS__" for the property names.
This is wrong. Same goes for object method calls (ex. "$obj->{..}(..)").
This diff fixes HipHop to recognize magic constants for properties names in
"$obj->{..}" expressions and method names in "$obj->{..}(..)" expressions.
Per @mwilliams' suggestion, this is the first stage in a staggered approach to replacing int64 with int64_t. More precisely I inserted "typedef ::int64_t int64;" in util/base.h and dealt with the consequences.
This change is mostly for FB internal organizational reasons.
Building is not effected beyond the fact that the target now
lands in hphp/hhvm/hhvm rather than src/hhvm/hhvm.
ptarjan