hg: jdk/jdk: 8147017: Platform.isGraal should be removed

[igor.ignatyev at oracle.com]

Changeset: 09b295eb214b
Author:    iignatyev
Date:      2019-11-20 18:23 -0800
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/09b295eb214b

8147017: Platform.isGraal should be removed
Reviewed-by: kvn, mseledtsov

! test/hotspot/jtreg/gc/g1/TestGCLogMessages.java
! test/hotspot/jtreg/runtime/CommandLine/OptionsValidation/common/optionsvalidation/JVMOptionsUtils.java
! test/hotspot/jtreg/testlibrary_tests/TestMutuallyExclusivePlatformPredicates.java
! test/lib/jdk/test/lib/Platform.java
! test/lib/jdk/test/lib/cli/CommandLineOptionTest.java