Don't generate QSTRs for wrong identifiers

MP_REGISTER_MODULE would use identifiers like
"MODULE_DEF_MP_QSTR___FUTURE__" which would in turn cause
a QSTR to be generated for it. This wasn't desirable, because the
qstr would never be used.

This clears out quite a bit of flash storage on the proxlight trinkey.

Author: jepler

py/genlast.py

@@ -12,7 +12,7 @@
 from makeqstrdefs import qstr_unescape, QSTRING_BLOCK_LIST
 
 re_line = re.compile(r"#[line]*\s(\d+)\s\"([^\"]+)\"", re.DOTALL)
-re_qstr = re.compile(r"MP_QSTR_[_a-zA-Z0-9]+", re.DOTALL)
+re_qstr = re.compile(r"\bMP_QSTR_[_a-zA-Z0-9]+", re.DOTALL)
 re_translate = re.compile(r"translate\(\"((?:(?=(\\?))\2.)*?)\"\)", re.DOTALL)