RFR: 8276905: Function frag_col has a deployment target which is incompatible with this OS [v2]

[Jayathirth D V]

> When JDK is built on BigSur with Xcode12.5 and used to run jtreg tests in macOS10.15 with Xcode <=12.4 we are getting compilation error. We dont set any deployment target when when we use xcrun to create .air file and this issue looks similar to https://developer.apple.com/forums/thread/105719. Also https://developer.apple.com/forums/thread/105719 states that even if they set app deployment target they need to explicitly set deployment in "xcrun metal".
> 
> Made same change to use -mmacosx-version-min=10.12.00 in our make file. Whether we should keep 10.12.00 or 10.13/14 is open to discussion for metal pipeline.
> 
> SwingSet2, J2DDemo & JCK/jtreg runs in CI are green. Also Vitaly(Submitter) has confirmed that patch resolves the issue.

Jayathirth D V has updated the pull request incrementally with one additional commit since the last revision:

  Use Macro for version

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6346/files
  - new: https://git.openjdk.java.net/jdk/pull/6346/files/a9f521a5..7f999650

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6346&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6346&range=00-01

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6346.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6346/head:pull/6346

PR: https://git.openjdk.java.net/jdk/pull/6346