Fixed pkg-config results

Now the pkg-config will return the needed libs and will generate them.

1. -lopencv_sfm -> while this module is not in OpenCV, people would like to link against it using libmv, as to use the converted code, so it needs to be included in the the libmv.pc.

2. Also the build didn't generate a libbase.so file which was needed again because of -lbase.

This should fix any linking problems that may occur.