RFR: 8166002: Emulate client build on platforms with reduced virtual address space

[Jamsheed C m]

Hi All,

bug id:https://bugs.openjdk.java.net/browse/JDK-8166002

http://cr.openjdk.java.net/~jcm/8166002/webrev.00/

Fix: set NeverActAsServerClassMachine=true, Limit TieredCompilation to 
C1 by default, for win32 platform.

A new flag CompilationMode=<client/server> is introduced to select 
server/ client mode compilation. This option is supported only in TIERED 
builds.

-XX:CompilationMode=server supports both -XX:+/-TieredCompilation.

-XX:CompilationMode:client ignores TieredCompilation flag.

Please review,

Best Regards,

Jamsheed