enum: Update references to new lib/enum/ location.

Updated:
- ports/stm32/boards/manifest_enum.py to reference lib/enum/enum.py
- test_cpython_compat.py to add lib/enum to sys.path

All tests still pass with new location.

Signed-off-by: Andrew Leech <[email protected]>

Author: pi-anl

ports/stm32/boards/manifest_enum.py

@@ -0,0 +1,6 @@
+# Include default manifests
+include("$(PORT_DIR)/boards/manifest.py")
+include("$(PORT_DIR)/boards/manifest_pyboard.py")
+
+# Freeze enum module for size testing
+freeze("../../../lib/enum", "enum.py")

test_cpython_compat.py

@@ -4,6 +4,9 @@
 identically to CPython's enum module for supported features.
 """
 
+import sys
+
+sys.path.insert(0, "lib/enum")
 from enum import Enum, IntEnum