OpenJDK 11: Merging in java.lang.Long (toUnsignedString0() helper)

This is part of merging upstream changes from OpenJDK 11.28. This CL
updates 950-redefine-intrinsic test to reflect changes of the
formatUnsignedLong0() helper method in java.lang.Long class from
libcore.

Bug: 207772338
Test: art/test/testrunner/testrunner.py --host \
      -t 950-redefine-intrinsic
Test: treehugger
Change-Id: I3d13e8bb143b998a2122774cc1bb69da65f99a2e
1 file changed