openjdk8: workaround for @rpath/libfreetype.6.dylib UnsatisfiedLinkError

[breun]

Description

Workaround for adoptium/temurin-build#489

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 10.14.2 18C54
Xcode 10.1 10B61

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• checked your Portfile with port lint?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?

[macportsbot]

Travis Build #4698 Passed.

Lint results

--->  Verifying Portfile for openjdk8
--->  0 errors and 0 warnings found.

Port openjdk8 success on xcode9.4. Log
Port openjdk10 success on xcode9.4. Log
Port openjdk11 success on xcode9.4. Log
Port openjdk11-openj9 success on xcode9.4. Log
Port openjdk8 success on xcode8.3. Log
Port openjdk10 success on xcode8.3. Log
Port openjdk11 success on xcode8.3. Log
Port openjdk11-openj9 success on xcode8.3. Log
Port openjdk8 success on xcode7.3. Log
Port openjdk10 success on xcode7.3. Log
Port openjdk11 success on xcode7.3. Log
Port openjdk11-openj9 success on xcode7.3. Log
Port openjdk8 success on xcode10.1. Log
Port openjdk10 success on xcode10.1. Log
Port openjdk11 success on xcode10.1. Log

[pmetzger]

I don't know enough to judge this one, but you're the maintainer. Thanks for the update, @breun! I've merged it.