git: openjdk/mobile: 8147017: Platform.isGraal should be removed

[duke]

Changeset: 1d41e867
Author:    Igor Ignatyev <iignatyev at openjdk.org>
Date:      2019-11-20 18:23:06 +0000
URL:       https://git.openjdk.java.net/mobile/commit/1d41e867

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