Quarantine test until JDK-8156159 is implemented.

diff -r 481284d8ed27 test/compiler/jvmci/compilerToVM/ReadUncompressedOopTest.java
--- a/test/compiler/jvmci/compilerToVM/ReadUncompressedOopTest.java Fri May 06 18:08:01 2016 +0000
+++ b/test/compiler/jvmci/compilerToVM/ReadUncompressedOopTest.java Fri May 06 15:14:33 2016 -0700
@@ -24,6 +24,7 @@
 /*
  * @test
  * @bug 8136421
+ * @ignore 8155216
  * @requires (os.simpleArch == "x64" | os.simpleArch == "sparcv9" | os.simpleArch == "aarch64")
  * @library / /testlibrary /test/lib/
  * @library ../common/patches