Support for concurrent scavenge on Windows

[0dvictor]

Issue or pull request number:

eclipse-openj9/openj9#4108

Overview:

The above issue is tracking a series of changes being made to OpenJ9 to expand the support for pause-less garbage collector on the x86 platform: it is now supported on Windows for both default and large heap specifications.

Applies to the following JDK versions:

8 and later

Applies to the following platforms:

64-bit Windows X

Remarks

There is no option change. The existing -Xgc:concurrentScavenge option has been enhanced, so that the following line should now read "(64-bit: Windows on x86, Linux on x86, Linux on IBM Z®, or z/OS® only)".

(64-bit: Linux on x86, Linux on IBM Z®, or z/OS® only)