gjavah.c (throwable_p): Accept argument as either a classname or signature fragment.

gjavah.c (throwable_p): Accept argument as either a classname or signature fragment.

	* gjavah.c (throwable_p): Accept argument as either a classname or
	signature fragment. Create null-terminated classname string for super
	when calling itself recursively.
	(decode_signature_piece): Skip first character from class name
	signature when calling throwable_p.

From-SVN: r54427