added apploader test userland application

this app sends the tab file of an app that needs to be flashed to the capsule. once the app binary is written to flash, the userland app requests kernel to load the app.

Author: viswajith-g

examples/tests/app_loader/pre_flashed/Makefile

@@ -0,0 +1,11 @@
+# Makefile for user application
+
+# Specify this directory relative to the current application.
+TOCK_USERLAND_BASE_DIR = ../../../..
+
+# Which files to compile.
+C_SRCS := $(wildcard *.c)
+
+# Include userland master makefile. Contains rules and flags for actually
+# building the application.
+include $(TOCK_USERLAND_BASE_DIR)/AppMakefile.mk