[JAVA] Overhaul Java front-end's builtin handling.

[Andrew Haley]

Roger Sayle writes:
 > Ok for mainline?
 > 
 > 
 > 2003-05-31  Roger Sayle  <roger@eyesopen.com>
 > 
 > 	* builtins.c (define_builtin_type, builtin_types): Delete.
 > 	(define_builtin): Rewritten to take just the built-in code,
 > 	the function's name, type and fallback library function name.
 > 	All built-ins used by Java are implicit and BUILT_IN_NORMAL.
 > 	(initialize_builtins): Overhaul to define the GCC builtins
 > 	used by gcj manually, providing the Java run-time's
 > 	implementations as the fallback library function.
 > 
 > 	* libjava.lang/MathBuiltin.java: New test case.
 > 	* libjava.lang/MathBuiltin.out: New file.

OK.

Andrew.