RFR: 8024256 Minimal VM build is broken with PCH disabled

[David Holmes]

Disabling precompiled headers (PCH) has exposed a number of bugs with 
the INCLUDE_XXX guards used by the minimal VM. In most cases a header 
needed to be moved out of the guard or the guards removed. In one case a 
file can be excluded completely and so its header no longer needs the guard.

webrev: http://cr.openjdk.java.net/~dholmes/8024256/webrev/

Thanks,
David