git: openjdk/jdk16u: 8253702: BigSur version number reported as 10.16, should be 11.nn

[Christoph Langer]

Changeset: c7275282
Author:    Christoph Langer <clanger at openjdk.org>
Date:      2021-02-19 18:16:48 +0000
URL:       https://git.openjdk.java.net/jdk16u/commit/c7275282

8253702: BigSur version number reported as 10.16, should be 11.nn

Backport-of: 66757750a2adf0739d0f5bf98a3f50a123b7adcf

! src/java.base/macosx/native/libjava/java_props_macosx.c