hg: jigsaw/jake/jdk: Do not define TARGET_PLATFORM property in release file

[mandy.chung at oracle.com]

Changeset: a20dcd573138
Author:    mchung
Date:      2017-05-01 21:11 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/a20dcd573138

Do not define TARGET_PLATFORM property in release file

! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/ReleaseInfoPlugin.java
! test/tools/jlink/IntegrationTest.java