add build support for incoming fxSDK 2

Adds an fxsdk.make file that describes rules for default builds of the
library. This is compatible with custom builds (by disabling the
configure step in fxSDK 2) and mostly useful as a fast installer.

fxsdk.make

@@ -0,0 +1,16 @@
+# fxsdk: version=1
+
+configure:
+	mkdir -p build-fx && cd build-fx && ../configure --target=fx9860g
+	mkdir -p build-cg && cd build-cg && ../configure --target=fxcg50
+
+build:
+	make all
+
+install:
+	make install
+
+uninstall:
+	make uninstall
+
+.PHONY: configure build install uninstall