[UBSan] Disable one run line of this test to allow the test as a whole
to pass in an opt build.

The test case in question does show UBSan catching the error, but it
doesn't then successfully set the exit code of the program. I'll let the
UBSan folks sort out why. It should reproduce trivially with an
optimized build.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@219563 91177308-0d34-0410-b5e6-96231b3b80d8