RFR: 8271420: Extend CDS custom loader support to Windows platform [v2]

[Yumin Qi]

> Currently CDS does not support custom loaders on Windows, this patch extends  the support to Windows 64 bit platform.
> 
> Tests: mach5 tier1-4
> 
> Thanks
> Yumin

Yumin Qi has updated the pull request incrementally with one additional commit since the last revision:

  Revert change for not-custom loader related, fixed file relative path

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6202/files
  - new: https://git.openjdk.java.net/jdk/pull/6202/files/9460cafb..66f7c4dc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6202&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6202&range=00-01

  Stats: 6 lines in 5 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6202.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6202/head:pull/6202

PR: https://git.openjdk.java.net/jdk/pull/6202