RFR: 6945: Create build script for Windows [v4]

[Jean-Philippe Bempel]

> Build script for windows mimics behavior of the *nix one
> 
> Special handling for Jetty server with killing it at the end of the action

Jean-Philippe Bempel has updated the pull request incrementally with one additional commit since the last revision:

  add *.log in gitignore

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

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/147/files
  - new: https://git.openjdk.java.net/jmc/pull/147/files/3fe41846..4a773598

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=147&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=147&range=02-03

  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jmc/pull/147.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/147/head:pull/147

PR: https://git.openjdk.java.net/jmc/pull/147