arch: arm: Increase size of LK abort thread stack.

Change to increase size of LK abort thread stack.

Change-Id: I6cd1c61c392ce397f69e76f2b677c6e011f4ffc7
diff --git a/arch/arm/crt0.S b/arch/arm/crt0.S
index be6d4d6..51c9a2e 100644
--- a/arch/arm/crt0.S
+++ b/arch/arm/crt0.S
@@ -191,5 +191,5 @@
 	 * dynamically allocated stack, so we don't need it for very long
 	 */
 abort_stack:
-	.skip 2048
+	.skip 4096
 abort_stack_top: