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/tests/CMakeLists.txt

@@ -0,0 +1,22 @@
+set(USERSPACE_TESTS
+	test-fork
+	test-framebuffer
+	test-globals
+	test-mmap-shared
+	test-mouse
+	test-popen
+	test-sort
+	test-tcp
+	test-udp
+	test-unix-socket
+	test-window
+)
+
+foreach(project ${USERSPACE_TESTS})
+	add_subdirectory(${project})
+	add_dependencies(userspace ${project})
+	# This is to allow cmake to link when libc updates
+	target_link_options(${project} PRIVATE -nolibc)
+	# Default compile options
+	target_compile_options(${project} PRIVATE -g -O2)
+endforeach()