linux-user/syscall: Extract do_execve() from do_syscall1()

execve() is a particular case of execveat(). In order
to add do_execveat(), first factor do_execve() out.

Signed-off-by: Drew DeVault <sir@cmpwn.com>
Message-Id: <20221104081015.706009-1-sir@cmpwn.com>
[PMD: Split of bigger patch, filled description, fixed style]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20221104173632.1052-5-philmd@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
1 file changed