tree fa460f4c50db045474035fa67f7fb4e41731c6f4
parent 5e2ac29165a5ecdff9be1e8b3aa0c0f968abf539
author Logan Chien <loganchien@google.com> 1574270464 -0800
committer Logan Chien <loganchien@google.com> 1577114013 -0800

versioner: Update libc.map.txt to match annotations

This commit removes several symbol versions (API 14 and 15) from
`libc.map.txt` because we no longer support NDK with those API levels.
This also matches the versioner annotations in the header files.

This commit also annotates twalk() with __INTRODUCED_IN(21).  It was
accidentally removed in aosp/1157510.

Test: source development/vndk/tools/header-checker/android/envsetup.sh && \
      source build/envsetup.sh && \
      lunch aosp_arm64-userdebug && \
      m versioner && \
      ./bionic/tools/versioner/run_tests.py
Change-Id: I211fe5b7b1b66793d5e76a8676f9d18825f96b5e