Add simple hello world application

run/hello.run

@@ -0,0 +1,26 @@
+build { core init app/hello }
+
+create_boot_directory
+
+install_config {
+    <config>
+    <parent-provides>
+    <service name="LOG"/>
+    <service name="PD"/>
+    <service name="CPU"/>
+    <service name="ROM"/>
+    </parent-provides>
+    <default-route>
+    <any-service><parent/><any-child/></any-service>
+    </default-route>
+    <default caps="50"/>
+    <start name="hello">
+    <resource name="RAM" quantum="1M"/>
+    </start>
+    </config>}
+
+build_boot_image { core ld.lib.so init hello }
+
+append qemu_args " -nographic "
+
+run_genode_until forever

src/app/hello/main.cc

@@ -0,0 +1,6 @@
+#include <base/component.h>
+
+void Component::construct(Genode::Env &env)
+{
+  Genode::log("Hello World!");
+}

src/app/hello/target.mk

@@ -0,0 +1,3 @@
+TARGET = hello
+SRC_CC = main.cc
+LIBS   = base