objint: Implement int.from_bytes() class method and .to_bytes() method.
These two are apprerently the most concise and efficient way to convert
int to/from bytes in Python. The alternatives are struct and array modules,
but methods using them are more verbose in Python code and less efficient
in memory/cycles.
diff --git a/py/qstrdefs.h b/py/qstrdefs.h
index 29eb51d..0c2c032 100644
--- a/py/qstrdefs.h
+++ b/py/qstrdefs.h
@@ -96,6 +96,7 @@
Q(exec)
Q(filter)
Q(float)
+Q(from_bytes)
Q(getattr)
Q(globals)
Q(hash)
@@ -127,6 +128,7 @@
Q(super)
Q(str)
Q(sys)
+Q(to_bytes)
Q(tuple)
Q(type)
Q(value)