Add support for verbose "local" service runscript

With this patch, the "local" service runscript will be verbose like the
"sysctl" service when 'rc_verbose="yes"' is set.

Example output successful start:
```
 * Stopping local ...
 *   Executing "/etc/local.d/00will-stop.stop" ...                  [ ok ]
 * Starting local ...
 *   Executing "/etc/local.d/00will-start.start" ...                [ ok ]
 *   Executing "/etc/local.d/01 test.start" ...                     [ ok ]
```
Example output with failing executables:
```
 * Stopping local ...
 *   Executing "/etc/local.d/00will-stop.stop" ...                  [ ok ]
 *   Executing "/etc/local.d/will-fail.stop" ...
mount: can't find foo in /etc/fstab
 *   Execution of "/etc/local.d/will-fail.stop" failed.             [ !! ]
 * Starting local ...
 *   Executing "/etc/local.d/00will-start.start" ...                [ ok ]
 *   Executing "/etc/local.d/01 test.start" ...                     [ ok ]
 *   Executing "/etc/local.d/will-fail2.start" ...
mount: can't find bar in /etc/fstab
 *   Execution of "/etc/local.d/will-fail2.start" failed.           [ !! ]
 *   Executing "/etc/local.d/will-fail.start" ...
mount: can't find foo in /etc/fstab
 *   Execution of "/etc/local.d/will-fail.start" failed.            [ !! ]
```
X-Gentoo-Bug: 489274
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=489274