Set clone-depth="1" for *-kernel projects

Change-Id: Ibd46494bda9d96437d85b1ee026d6579258c26de

default.xml

@@ -26,7 +26,7 @@
   <project path="development" name="platform/development" />
   <project path="device/asus/deb" name="device/asus/deb" groups="device,flo" />
   <project path="device/asus/flo" name="device/asus/flo" groups="device,flo" />
-  <project path="device/asus/flo-kernel" name="device/asus/flo-kernel" groups="device,flo" />
+  <project path="device/asus/flo-kernel" name="device/asus/flo-kernel" groups="device,flo" clone-depth="1" />
   <project path="device/asus/grouper" name="device/asus/grouper" groups="device,grouper" />
   <project path="device/asus/tilapia" name="device/asus/tilapia" groups="device,grouper" />
   <project path="device/common" name="device/common" />
@@ -41,9 +41,9 @@
   <project path="device/google/accessory/arduino" name="device/google/accessory/arduino" groups="device" />
   <project path="device/google/accessory/demokit" name="device/google/accessory/demokit" groups="device" />
   <project path="device/lge/hammerhead" name="device/lge/hammerhead" groups="device,hammerhead" />
-  <project path="device/lge/hammerhead-kernel" name="device/lge/hammerhead-kernel" groups="device,hammerhead" />
+  <project path="device/lge/hammerhead-kernel" name="device/lge/hammerhead-kernel" groups="device,hammerhead" clone-depth="1" />
   <project path="device/lge/mako" name="device/lge/mako" groups="device,mako" />
-  <project path="device/lge/mako-kernel" name="device/lge/mako-kernel" groups="device,mako" />
+  <project path="device/lge/mako-kernel" name="device/lge/mako-kernel" groups="device,mako" clone-depth="1" />
   <project path="device/sample" name="device/sample" groups="pdk" />
   <project path="device/samsung/manta" name="device/samsung/manta" groups="device,manta" />
   <project path="docs/source.android.com" name="platform/docs/source.android.com" />