RFR: 8221701: Archive constant BaseLocales

[Claes Redestad]

Hi,

by archiving constant BaseLocale objects, we can simplify (and speed up)
creation of the constant Locale objects in java.util.Locale which are
unconditionally created during startup.

Bug:    https://bugs.openjdk.java.net/browse/JDK-8221701
Webrev: http://cr.openjdk.java.net/~redestad/8221701/open.00/

Testing: tier1-3, along with patches for JDK-8221723 and
JDK-8221724

Performance: a small reduction in bytecode executed during startup (-6k,
or ~1% of bootstrap), a small reduction in number of classes loaded
on small applications (458 -> 451 on a simple Hello World).

Thanks!

/Claes