Add CDT configuration to Eclipse project

No longer need to add spaces in random places.  Was so annoying.

Note: you need to set the NDK path under Window -> Preferences -> Android -> NDK.  This will not copy assets though, I don't think (maybe we can add a make rule instead?)

I have only tested this on my local Eclipse, I dunno if it will work properly for others, so might want to test it before merging.

Also, I recommend selecting "armv7debug" as the build configuration.  On "ppsspp", right click -> Properties -> C/C++ Build -> Manage Configurations... -> Set Active.  This builds with NDK_DEBUG=1 (so you can use gdb stuff), and only builds armv7 (no more editing batch files or waiting for x86/armv6 to build.)

-[Unknown]