arm: Fix up help.exp regression

arm: Fix up help.exp regression

On Thu, Jan 20, 2022 at 11:27:20AM +0000, Richard Earnshaw via Gcc-patches wrote:
> gcc/ChangeLog:
>
>       * config/arm/arm.opt (mfix-cortex-a57-aes-1742098): New command-line
>       option.
>       (mfix-cortex-a72-aes-1655431): New option alias.

> --- a/gcc/config/arm/arm.opt
> +++ b/gcc/config/arm/arm.opt
> @@ -272,6 +272,16 @@ mfix-cmse-cve-2021-35465
>  Target Var(fix_vlldm) Init(2)
>  Mitigate issues with VLLDM on some M-profile devices (CVE-2021-35465).
>
> +mfix-cortex-a57-aes-1742098
> +Target Var(fix_aes_erratum_1742098) Init(2) Save
> +Mitigate issues with AES instructions on Cortex-A57 and Cortex-A72.
> +Arm erratum #1742098
> +
> +mfix-cortex-a72-aes-1655431
> +Target Alias(mfix-cortex-a57-aes-1742098)
> +Mitigate issues with AES instructions on Cortex-A57 and Cortex-A72.
> +Arm erratum #1655431
> +
>  munaligned-access
>  Target Var(unaligned_access) Init(2) Save
>  Enable unaligned word and halfword accesses to packed data.

This breaks:
Running /usr/src/gcc/gcc/testsuite/gcc.misc-tests/help.exp ...
FAIL: compiler driver --help=target option(s): "^ +-.*[^:.]$" absent from output: "  -mfix-cortex-a57-aes-1742098 Mitigate issues with AES instructions on Cortex-A57 and Cortex-A72. Arm erratum #1742098"

help.exp with help of lib/options.exp tests whether all non-empty descriptions of
options are terminated with . or :.

2022-02-03  Jakub Jelinek  <jakub@redhat.com>

	* config/arm/arm.opt (mfix-cortex-a57-aes-1742098,
	mfix-cortex-a72-aes-1655431): Ensure description ends with full stop.