samus: Increase ALS task size
samus: Increase ALS task size

Sometimes I2C1 is wedging and this can cause the ALS task to
overflow its stack.

As a temporary measure to stop the random reboots increase the
ALS task size.

BUG=chrome-os-partner:32471
BRANCH=samus
TEST=build and boot on samus with stuck I2C1
taskinfo before (after fresh reboot):
   2   ALS              00000000    0.001012  364/384
taskinfo after (notice it is >384 after some time):
   2   ALS              00000000    0.031586  400/512

Change-Id: I04e9b93d3cc60afd3303eb4610c81952f365b992
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/220442
Reviewed-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>

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