Request for review: 7150058: Allocate symbols from null boot loader to an arena for NMT

[Coleen Phillimore]

Please review this change to allocate symbols from the boot class loader 
into a  global arena.   This change reduces reporting traffic at startup 
for the native memory tracking project in development.  It is also 
useful for class data sharing in the permgen elimination project, also 
in development.   I had to increase the SharedMiscSize because 
ResourceObj in debug mode is 2 extra pointers.

open webrev at http://cr.openjdk.java.net/~coleenp/symbol-arena
bug link at http://bugs.sun.com/view_bug.do?bug_id=7150058

Thanks,
coleen