devel/py-qtbuilder: Fix build

writing byte-compilation script '/tmp/tmp5hwcw4h5.py'
/usr/local/bin/python3.8 /tmp/tmp5hwcw4h5.py

File "/usr/local/lib/python3.8/site-packages/pyqtbuild/bundle/bundle.py", line 72
  sub_parts = parts[0].split('_')
  ^

SyntaxError: invalid syntax

removing /tmp/tmp5hwcw4h5.py
...
writing list of installed files to '/wrkdirs/usr/ports/devel/py-qtbuilder/work-py38/.PLIST.pymodtmp'
/usr/local/lib/python3.8/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.

warnings.warn(
File "/usr/local/lib/python3.8/site-packages/pyqtbuild/bundle/bundle.py", line 72
  sub_parts = parts[0].split('_')
  ^

SyntaxError: invalid syntax

...

> Checking for pkg-plist issues (check-plist)

> Parsing plist

> Checking for items in STAGEDIR missing from pkg-plist

> Checking for items in pkg-plist which are not in STAGEDIR

Error: Missing: %%PYTHON_SITELIBDIR%%/pyqtbuild/bundle/__pycache__/bundle%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
Error: Missing: %%PYTHON_SITELIBDIR%%/pyqtbuild/bundle/__pycache__/bundle%%PYTHON_EXT_SUFFIX%%.pyc

> Error: Plist issues found.

• Error code 1

Stop.
make: stopped in /usr/ports/devel/py-qtbuilder

>> Error: check-plist failures detected

Approved by: portmgr (blanket)