Create the dbm package from PEP 3108. #2881.
diff --git a/PC/os2vacpp/makefile b/PC/os2vacpp/makefile
index 50119a0..55bb783 100644
--- a/PC/os2vacpp/makefile
+++ b/PC/os2vacpp/makefile
@@ -494,7 +494,7 @@
 	 $(PY_INCLUDE)\stringobject.h $(PY_INCLUDE)\sysmodule.h $(PY_INCLUDE)\traceback.h \
 	 $(PY_INCLUDE)\tupleobject.h
 
-dbmmodule.obj: $(PY_INCLUDE)\abstract.h $(PY_INCLUDE)\ceval.h $(PY_INCLUDE)\classobject.h \
+_dbmmodule.obj: $(PY_INCLUDE)\abstract.h $(PY_INCLUDE)\ceval.h $(PY_INCLUDE)\classobject.h \
 	 $(PY_INCLUDE)\cobject.h $(PY_INCLUDE)\complexobject.h pyconfig.h \
 	 $(PY_INCLUDE)\dictobject.h $(PY_INCLUDE)\fileobject.h $(PY_INCLUDE)\floatobject.h \
 	 $(PY_INCLUDE)\funcobject.h $(PY_INCLUDE)\import.h $(PY_INCLUDE)\intobject.h \
@@ -576,7 +576,7 @@
 	 $(PY_INCLUDE)\stringobject.h $(PY_INCLUDE)\sysmodule.h $(PY_INCLUDE)\traceback.h \
 	 $(PY_INCLUDE)\tupleobject.h
 
-gdbmmodule.obj: $(PY_INCLUDE)\abstract.h $(PY_INCLUDE)\ceval.h $(PY_INCLUDE)\classobject.h \
+_gdbmmodule.obj: $(PY_INCLUDE)\abstract.h $(PY_INCLUDE)\ceval.h $(PY_INCLUDE)\classobject.h \
 	 $(PY_INCLUDE)\cobject.h $(PY_INCLUDE)\complexobject.h pyconfig.h \
 	 $(PY_INCLUDE)\dictobject.h $(PY_INCLUDE)\fileobject.h $(PY_INCLUDE)\floatobject.h \
 	 $(PY_INCLUDE)\funcobject.h $(PY_INCLUDE)\import.h $(PY_INCLUDE)\intobject.h \