BuildSystem: Cleanup userspace directory layout

userspace programs are now in userspace/programs
userspace tests are now in userspace/tests

This makes listing userspace projects much cleaner. Libraries were
already separated to their own directory, so other programs should also.

userspace/programs/sudo/CMakeLists.txt

@@ -0,0 +1,16 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(sudo ${SOURCES})
+banan_link_library(sudo libc)
+
+install(
+	TARGETS sudo
+	PERMISSIONS
+		OWNER_READ OWNER_WRITE OWNER_EXECUTE
+		GROUP_READ GROUP_EXECUTE
+		WORLD_READ WORLD_EXECUTE
+		SETUID
+	OPTIONAL
+)