options: Avoid unused variable mask warning [PR97305]

options: Avoid unused variable mask warning [PR97305]

> options-save.c: In function 'void cl_target_option_save(cl_target_option*, gcc_options*, gcc_options*)':
> options-save.c:8526:26: error: unused variable 'mask' [-Werror=unused-variable]
>  8526 |   unsigned HOST_WIDE_INT mask = 0;
>       |                          ^~~~
> options-save.c: In function 'void cl_target_option_restore(gcc_options*, gcc_options*, cl_target_option*)':
> options-save.c:8537:26: error: unused variable 'mask' [-Werror=unused-variable]
>  8537 |   unsigned HOST_WIDE_INT mask;
>       |                          ^~~~

Oops, missed that, sorry.

The following patch should fix that, tested on x86_64-linux make
options-save.c (same file as before) and -> ia64-linux cross make
options-save.o (no warning anymore, just the unwanted declarations gone).

2020-10-07  Jakub Jelinek  <jakub@redhat.com>

	PR bootstrap/97305
	* optc-save-gen.awk: Don't declare mask variable if explicit_mask
	array is not present.