Request for reviews (S): 6914622: Print values of all flags for product VM

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/6914622/webrev

Fixed 6914622: Print values of all flags for product VM

Change the flag -XX:+PrintFlagsFinal to product.
Add new product flag -XX:+PrintFlagsInitial to print all VM flags before
arguments processing, it is duplicate of debug flag -Xprintflags.
Move all related print flags together.

Partially contributed by: Gary Benson
Note, the changes are different from suggested by Gary Benson
since I can't change -Xprintflags without approval, so I added
new option instead.

Reviewed by:

Fix verified (y/n): y

Other testing:
JPRT