[jdk16u] RFR: 8265531: doc/building.md should mention homebrew install freetype [v2]

[George Adams]

> Backport of 8265531: doc/building.md should mention homebrew install freetype

George Adams 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 5aab1609b97284ccff8b7ae20a3ddcf1e29c47d7

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Changes:
  - all: https://git.openjdk.java.net/jdk16u/pull/109/files
  - new: https://git.openjdk.java.net/jdk16u/pull/109/files/6e878894..745586a9

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=109&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=109&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/109.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/109/head:pull/109

PR: https://git.openjdk.java.net/jdk16u/pull/109