manifest: Update the kernel checkout path

Version number is not needed in the path as we will only use on kernel
version at any given milestone.

Change-Id: I1150cdf638cc2f5be0e9764ed20951c15df6798f
diff --git a/full.xml b/full.xml
index 7cf169a..91d6658 100644
--- a/full.xml
+++ b/full.xml
@@ -12,7 +12,7 @@
            name="cros/chromiumos/overlays/board-overlays" />
 
   <!-- Kernels -->
-  <project path="src/third_party/kernel/v4.19"
+  <project path="src/third_party/kernel"
            name="third_party/kernel"
            revision="refs/heads/lakitu-4.19" />