Merge "Use nullptr instead of NULL for make_pair" am: 9ba7525071 am: ed2343ac19 am: 4c3a90b696

Original change: https://android-review.googlesource.com/c/platform/frameworks/compile/mclinker/+/1949444

Change-Id: I049dd98009c146c7b09c12d91df4db28691c3516