gdb/testsuite: resolve duplicate test names in gdb.guile/*.exp

This commit resolves almost all of the remaining duplicate test names
in gdb.guile/*.exp.  This is done by either:

 - Making use of with_test_prefix,
 - Giving tests a unique name,
 - Extending the existing name to make it unique,
 - Not printing PASS lines for simple setup commands (e.g. loading
   support modules, or adjusting GDB internal settings not relating to
   guile).

gdb/testsuite/ChangeLog:

	* gdb.guile/scm-frame-args.exp: Add with_test_prefix to resolve
	duplicate test names.
	* gdb.guile/scm-parameter.exp: Provide test names to avoid
	duplicate names based on the command being run.
	* gdb.guile/scm-symbol.exp: Extend test name to make it unique.
	* gdb.guile/scm-type.exp (restart_gdb): Don't print PASS line when
	loading a support module.
	(test_equality): Update test name to match the actual test, making
	the name unique in the process.
	* gdb.guile/scm-value.exp (test_value_in_inferior): Add test names
	to resolve duplicate tests.
	(test_inferior_function_call): Likewise.
	(test_subscript_regression): Likewise.