action: drop global actionInitialized

action: drop global actionInitialized

The action.c needs to use two constant Expr values, constTrue and
constFalse. To do this is keeps to static globals Expr's of type boolean
and the values "true" and "false" which need to be interned (and thus
context specific). The interning means they can't be made static const,
so there's a global flag and initializer function.

Instead of using this unsafe global state, we can simply use an integer
boolean expression (1 and 0) instead of a string one ("true" and
"false") and make them const.

Signed-off-by: Ran Benita <ran234@gmail.com>