Bump version to 8.1.0352

- 8.1.0343: 'shellslash' is not used for getcwd() with local directory.
  (Daniel Hahler) Call slash_adjust() later. (closes #3399)
- 8.1.0344: 'hlsearch' highlighting has a gap after /$. Remove
  suspicious code. (Ricky Zhou, closes #3400)
- 8.1.0345: Cannot get the window id associated with the location list.
  Add the "filewinid" argument to getloclist(). (Yegappan Lakshmanan,
  closes #3202)
- 8.1.0346: Building with Aap is outdated and unused. Remove the Aap
  build files.
- 8.1.0347: Some tests fail on Solaris. Skip writefile test. Fix path to
  libc.so. Improve test for Turkish case change. (Libor Bukata, Bjorn
  Linse, closes #3403)
- 8.1.0348: On Travis the slowest build is run last. (Dominique Pelle)
  Reorder the build entries.
- 8.1.0349: Crash when wiping buffer in a callback. Do not handle
  messages when only peeking for a character. (closes #2107) Add
  "redraw_flag" to test_override().
- 8.1.0350: Vim may block on ch_sendraw() when the job is sending data
  back to Vim, which isn't read yet. (Nate Bosch) Add the "noblock"
  option to job_start(). (closes #2548)
- 8.1.0351: 'incsearch' for :/foo/s//<Esc> changes last search pattern.
  Save the last search pattern earlier.
- 8.1.0352: Browsing compressed tar files does not always work. Use the
  "file" command to get the compression type.