[jdk11u-dev] RFR: 8251549: Update docs on building for Git [v2]

[Severin Gehwolf]

> Hi,
> 
> Now that OpenJDK 11u is fully on Git we should update the docs to no longer refer to Mercurial and use Git instead. The JDK 16 patch doesn't apply clean due to some differences in the file (e.g. referring to JDK 8 vs. JDK 11 in head). `doc/building.html` is the result of running `make update-build-docs` when the `building.md` file has the relevant changes.
> 
> Thoughts?

Severin Gehwolf has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Backport 042734cc5b17302a8f2ecdf577511bd6d5ec5e22

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

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/205/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/205/files/cce60747..bbbd50ef

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=205&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=205&range=00-01

  Stats: 143 lines in 1 file changed: 3 ins; 29 del; 111 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/205.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/205/head:pull/205

PR: https://git.openjdk.java.net/jdk11u-dev/pull/205