RFR: 8263904: compiler/intrinsics/bmi/verifycode/BzhiTestI2L.java fails on x86_32

[Marcus G K Williams]

Further fixes (in addition to https://github.com/openjdk/jdk/pull/3104) for issue where BzhiTestI2L.java fails on x86_32.  bzhiq instructions are only generated on x86_64.

This adds a skip to the test if `Platform.isX86()` and uses `((BmiTestCase) testCase).getTestCaseX64() && Platform.isX64()` to decide when to use `((BmiTestCase_x64) testCase).getInstrPattern_x64()` versus `((BmiTestCase) testCase).getInstrPattern()` (x86_32 version of instruction)

Signed-off-by: Marcus G K Williams <marcus.williams at intel.com>

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Commit messages:
 - 8263904 Fix BzhiTestI2L fail x86_32

Changes: https://git.openjdk.java.net/jdk/pull/3128/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3128&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263904
  Stats: 6 lines in 2 files changed: 5 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3128.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3128/head:pull/3128

PR: https://git.openjdk.java.net/jdk/pull/3128