[jdk11u-dev] RFR: 8283323: libharfbuzz optimization level results in extreme build times [v2]

[Tyler Steele]

> This PR backports changes to improve build performance with xlc.
> 
> It appears that the file was at `make/modules/java.desktop/lib/Awt2dLibraries.gmk` when  this commit was made, but that file has since been moved to `make/lib/Awt2dLibraries.gmk`. This made the change show up as a conflict when I applied this backport using the Skara tools. I resolved the 'conflict' by copying the changes to the new path and marking the previous path as removed.

Tyler Steele has updated the pull request incrementally with one additional commit since the last revision:

  Remove extra newline to match changes in backported commit

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

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/1077/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/1077/files/4905d538..dd7aa203

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=1077&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=1077&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/1077.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/1077/head:pull/1077

PR: https://git.openjdk.java.net/jdk11u-dev/pull/1077