toolbox: Add nohup command

Change-Id: I2f7d9934b54d98886d7a6205ea122d9ce91066ec
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/toolbox/Android.mk b/toolbox/Android.mk
index 75ce53f..c5890b2 100644
--- a/toolbox/Android.mk
+++ b/toolbox/Android.mk
@@ -69,7 +69,8 @@
 	swapon \
 	swapoff \
 	mkswap \
-	readlink
+	readlink \
+	nohup
 
 ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
 TOOLS += r