Since PEP 0488 and python 3.5, pyo files are eliminated and bytecode files

for level 1 optimization have opt-1.pyc extension
Adjust USE_PYTHON=py3kplist to handle this

Tested by:	koobs

Mk/Uses/python.mk

@@ -509,14 +509,19 @@ add-plist-pymod:
 # of TMPPLIST that end with .py[co], so that they conform
 # to PEP 3147 (see http://www.python.org/dev/peps/pep-3147/)
 PYMAGICTAG=		${PYTHON_CMD} -c 'import imp; print(imp.get_tag())'
+.if ${PYTHON_REL} < 3500
+PYOEXTENSION=	pyo
+.else
+PYOEXTENSION=	opt-1.pyc
+.endif
 add-plist-post:
 	@${AWK} '\
-		/\.py[co]$$/ && !($$0 ~ "/" pc "/") {id = match($$0, /\/[^\/]+\.py[co]$$/); if (id != 0) {d = substr($$0, 1, RSTART - 1); dirs[d] = 1}; sub(/\.py[co]$$/,  "." mt "&"); sub(/[^\/]+\.py[co]$$/, pc "/&"); print; next} \
+		/\.py[co]$$/ && !($$0 ~ "/" pc "/") {id = match($$0, /\/[^\/]+\.py[co]$$/); if (id != 0) {d = substr($$0, 1, RSTART - 1); dirs[d] = 1}; sub(/\.pyc$$/,  "." mt "&"); sub(/\.pyo$$/, "." mt "." pyo); sub(/[^\/]+\.py[co]$$/, pc "/&"); print; next} \
 		/^@dirrm / {d = substr($$0, 8); if (d in dirs) {print $$0 "/" pc}; print $$0; next} \
 		/^@dirrmtry / {d = substr($$0, 11); if (d in dirs) {print $$0 "/" pc}; print $$0; next} \
 		{print} \
 		' \
-		pc="__pycache__" mt="$$(${PYMAGICTAG})" \
+		pc="__pycache__" mt="$$(${PYMAGICTAG})" pyo="${PYOEXTENSION}" \
 		${TMPPLIST} > ${TMPPLIST}.pyc_tmp
 	@${MV} ${TMPPLIST}.pyc_tmp ${TMPPLIST}
 .endif # ${PYTHON_REL} >= 3200 && defined(_PYTHON_FEATURE_PY3KPLIST)