Request for review: 8010506 Typos and errors in gc-related flags in globals.hpp

[Tao Mao]

8010506 Typos and errors in gc-related flags in globals.hpp
https://jbs.oracle.com/bugs/browse/JDK-8010506

webrev:
http://cr.openjdk.java.net/~tamao/8010506/webrev.00/

Changeset:
NewRatio should defined as
product(uintx, NewRatio, 2,                                               \
     "Ratio of old/new generation sizes")                              \
instead of
product(uintx, NewRatio, 2,                                               \
     "Ratio of new/old generation sizes")                              \

PLUS other typos found by Jesper.