Allow parallel unit testing in make_all.sh
Allow parallel unit testing in make_all.sh

We are already applying arguments of make_all.sh to building ec binary
for each board. Let's also apply them to 'make runtests'.

BUG=None
TEST=util/make_all.sh -j8
BRANCH=None

Change-Id: I267aee662c015e65b737640815dbbb0cb72c58ba
Signed-off-by: Vic Yang <5fd92abeee651458f98e2856f4f200ee971cee4d@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/167826
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

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