minor, make glep-guts a self-includer

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, kick glep2, in preparation to the glep/glep2 merger
chore, move glep stuff out of libglod and into glep_SOURCES
major, marry glep and glep2, using simd glep matching for short pats and wu-manber for long ones
minor, check for whole words through xpuncsp() instead of xalnump() in wu-manber
minor, synchronise simd's pispuncs() with xpuncsp()
hygiene, secure wu-manber by pattern length assertion
fix, delist glep-guts.c as EXTRA_SOURCE
Merge branch 'tool/glep'

* tool/glep:
  fix, delist glep-guts.c as EXTRA_SOURCE
  hygiene, secure wu-manber by pattern length assertion
  minor, synchronise simd's pispuncs() with xpuncsp()
  minor, check for whole words through xpuncsp() instead of xalnump() in wu-manber
  major, marry glep and glep2, using simd glep matching for short pats and wu-manber for long ones
  chore, move glep stuff out of libglod and into glep_SOURCES
  chore, kick glep2, in preparation to the glep/glep2 merger
  minor, make glep-guts a self-includer