Fix some defcustom types

Fix some defcustom types

* lisp/whitespace.el (whitespace-style):
* lisp/gnus/message.el (message-screenshot-command):
* lisp/progmodes/compile.el (compilation-transform-file-match-alist):
* lisp/progmodes/gdb-mi.el (gdb-default-window-configuration-file):
* lisp/progmodes/python.el (python-pdbtrack-exit-command): Fix the
defcustom types.
* lisp/progmodes/sql.el (sql-password-wallet): Fix the value.