If an example is in the libopencm3 source directory it will use the
locally built library instead of the system library.
When you copy an example out of the libopencm3 tree it will
automatically detect it and build using the system wide installation.
- The library files are now being built into the lib subdirectory of the
source.
- The linker files for each library are being copied into the lib source
subdirectory.
Motivation: The relative locations of files in the source directory after make
are now the same as after make install now. This makes it easier to
reuse examples with their makefiles outside of the libopencm3
sourcecode directory.