arch: arm: increase the stack size of bootstarp thread

Increasing the stack size of the bootstrap thread to avoid
stack overflow.

Change-Id: I13437ea4194d9ae52e41532f4c2600dba10d536b
diff --git a/arch/arm/crt0.S b/arch/arm/crt0.S
index 2a72ce3..be6d4d6 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 1024
+	.skip 2048
 abort_stack_top: