* gdb.python/py-mi.exp: Use different file names for different

	versions of the executable under test.
	* gdb.python/py-prettyprint.exp: Likewise.
	* gdb.python/py-symbol.exp: Likewise.
	* gdb.python/py-template.exp: Likewise.
	* gdb.python/py-type.exp: Likewise.
	* gdb.python/py-value.exp: Likewise.