Tidy debug output for reboot command
Tidy debug output for reboot command

Should print what command is being executed, to help debug software sync

BUG=chrome-os-partner:11087
TEST=power on system, look for updated debug message, for example
   [1.636893 Executing host reboot command 5]

Change-Id: Ib543fc265fe881dc2089119ab3c0a52b0fce3b4d
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27659

alterapraxisptyltd/chromium-ec,gelraen/cros-ec,md5555/ec,alterapraxisptyltd/chromium-ec,longsleep/ec,longsleep/ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,thehobn/ec,eatbyte/chromium-ec,fourier49/BIZ_EC,fourier49/BZ_DEV_EC,gelraen/cros-ec,thehobn/ec,fourier49/BZ_DEV_EC,fourier49/BZ_DEV_EC,thehobn/ec,gelraen/cros-ec,coreboot/chrome-ec,eatbyte/chromium-ec,akappy7/ChromeOS_EC_LED_Diagnostics,mtk09422/chromiumos-platform-ec,gelraen/cros-ec,fourier49/BZ_DEV_EC,coreboot/chrome-ec,fourier49/BIZ_EC,eatbyte/chromium-ec,md5555/ec,eatbyte/chromium-ec,coreboot/chrome-ec,md5555/ec,md5555/ec,thehobn/ec,mtk09422/chromiumos-platform-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,alterapraxisptyltd/chromium-ec,alterapraxisptyltd/chromium-ec,fourier49/BIZ_EC,mtk09422/chromiumos-platform-ec,mtk09422/chromiumos-platform-ec,longsleep/ec,coreboot/chrome-ec,longsleep/ec