gdb/testsuite/

gdb/testsuite/
	* gdb.ada/arrayparam.exp (print first after function call): Use
	explicit package name.  Add a comment
	(print lasta after function call): Rename ...
	(print last after function call): ... it and use explicit package
	name.
	(print length after function call): Use explicit package name.
	* gdb.ada/str_ref_cmp.exp (operator = works for strings): New test.
	* gdb.ada/sym_print_name.exp: Change `i' to `integervar'.
	(multiple matches for symbol i): Rename ...
	(multiple matches for symbol integervar): ... it.
	* gdb.ada/sym_print_name/foo.adb (Foo): Change `I' to `IntegerVar'.
	* gdb.ada/sym_print_name/pck.ads (Pck): Likewise.