-z defs option

[kaz Kojima]

Hi,

SH4 needs a special symbol __fpscr_values which currently is defined
in crt1.o. The reference to it is generated by gcc for FP mode change,
so almost every shared lib for SH4 has it as an undefined symbol. Now
-z defs becomes a default option when building shared libs and there
is only flags to inhibit -z defs per each library. Can we add a flag
to avoid -z defs for all shared libraries?

Regards,
	kaz