perf-urgent-2020-03-29

 - perf probe:
    - Fix deletion of multiple probe events.
    - Fix userspace libraries handling by not depending on dwfl_module_addrsym().

 - event parsing:
    - Fix reading of invalid memory in event parsing.

 - python bindings:
    - Fix clang detection when using CC=clang-version.

 - build system:
    - Fix O= use with relative paths.

 - Android:
    - Fix off by one in strncpy() size argument when handling Android
      libraries.

 - Sync the tools headers