Ignore ZipFileTest and ZipInputStreamTest failures with CC.

These tests sometimes fail with a
java.util.concurrent.TimeoutException on ART Builbot's x86
and x86-64 concurrent collector configurations:
* libcore.java.util.zip.ZipFileTest#testZipFileWithLotsOfEntries
* libcore.java.util.zip.ZipInputStreamTest#testLongMessage

Bug: 26507762
Change-Id: I344d3ce4fbb4709025861ef2f009d768cc7524b8
1 file changed