Update .gitignore.

.gitignore

@@ -63,12 +63,8 @@ Makefile
 /interfaces/CdiInfo
 /interfaces/python/*.pyc
 /interfaces/python/*.pyo
-/interfaces/python/_CdiLib.so
-/interfaces/python/_CdiObj.so
+/interfaces/python/*.stamp
 /interfaces/python/__pychache__
-/interfaces/python/build
-/interfaces/ruby/CdiLib.so
-/interfaces/ruby/CdiObj.so
 /tests/*.parallel.c
 /tests/calendar_test1
 /tests/cksum_read