Log Message:
st-term: Update x11/st-term to 0.8.1

Changes:
0.8.1
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Regression fixes:
- Restore the old behaviour that the primary doesn't get deleted by a simple
  left click. Thanks, Daniel Tameling.
- Fix regression from commit 69e32a6 when setting the title. Thanks, quinq.

Fixes:
- Fix use after free, this code was always fragile, but triggered using the
  rewritten code.
- Don't modify argv: on some platforms (OpenBSD) arg.h used to change the
  exposed argv in tools using the kvm_* interface, such as ps and pgrep.