[Ada] Fix type mismatch warnings during LTO bootstrap #2

[Ada] Fix type mismatch warnings during LTO bootstrap #2

gcc/ada/

	* init.c (__gnat_raise_program_error): Fix parameter type.
	(Raise_From_Signal_Handler): Likewise and mark as no-return.
	* raise-gcc.c (__gnat_others_value): Fix type.
	(__gnat_all_others_value): Likewise.
	(__gnat_unhandled_others_value): Likewise.
	* seh_init.c (Raise_From_Signal_Handler): Fix parameter type.
	* libgnat/a-except.ads (Raise_From_Signal_Handler): Use convention C
	and new symbol name, move declaration to...
	(Raise_From_Controlled_Operation): Minor tweak.
	* libgnat/a-except.adb (Raise_From_Signal_Handler): ...here.
	* libgnat/a-exexpr.adb (bool): New C compatible boolean type.
	(Is_Handled_By_Others): Use it as return type for the function.