[committed] testsuite: Add signal checking for signal related testcase in analyzer.

[David Malcolm]

On Tue, 2020-07-21 at 14:28 +0800, Kito Cheng wrote:
>  - Verifed on RISC-V and x86.
> 
> gcc/testsuite/ChangeLog:
> 
> 	* gcc.dg/analyzer/signal-1.c: Add dg-require-effective-target
> 	signal.
> 	* gcc.dg/analyzer/signal-2.c: Ditto.
> 	* gcc.dg/analyzer/signal-3.c: Ditto.
> 	* gcc.dg/analyzer/signal-4a.c: Ditto.
> 	* gcc.dg/analyzer/signal-4b.c: Ditto.
> 	* gcc.dg/analyzer/signal-5.c: Ditto.
> 	* gcc.dg/analyzer/signal-6.c: Ditto.
> 	* gcc.dg/analyzer/signal-exit.c: Ditto.
> ---
>  gcc/testsuite/gcc.dg/analyzer/signal-1.c    | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-2.c    | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-3.c    | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-4a.c   | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-4b.c   | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-5.c    | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-6.c    | 1 +
>  gcc/testsuite/gcc.dg/analyzer/signal-exit.c | 1 +
>  8 files changed, 8 insertions(+)

Thanks.