scripts: zephyr_flash_debug: add missing nrfjprog line

The --pinreset line from the shell script is missing.

Signed-off-by: Marti Bolivar <marti.bolivar@linaro.org>
diff --git a/scripts/support/zephyr_flash_debug.py b/scripts/support/zephyr_flash_debug.py
index 921a716..6557a34 100755
--- a/scripts/support/zephyr_flash_debug.py
+++ b/scripts/support/zephyr_flash_debug.py
@@ -599,6 +599,10 @@
                  '-f', self.family, '--snr', board_snr],
                 ['nrfjprog', '--reset', '-f', self.family, '--snr', board_snr],
             ])
+        commands.append(['nrfjprog',
+                         '--pinreset',
+                         '-f', self.family,
+                         '--snr', board_snr])
 
         for cmd in commands:
             check_call(cmd, self.debug)