Feature: vigem driver for ddrio (#247)

Reads state of ddrio and updates vigem pads. Similar in vein to
viggem-sdvxio and vigem-iidxio

Useful for playing xinput related games with official hardware.

src/main/vigem-ddrio/Module.mk

@@ -0,0 +1,20 @@
+exes                  += vigem-ddrio
+
+deplibs_vigem-ddrio  := \
+    ViGEmClient \
+
+cppflags_vigem-ddrio  := \
+    -I src/imports \
+
+ldflags_vigem-ddrio  := \
+    -lsetupapi \
+
+libs_vigem-ddrio     := \
+    cconfig \
+    ddrio \
+    util \
+    vigemstub \
+
+src_vigem-ddrio      := \
+    main.c \
+    config-vigem-ddrio.c \