Update libfmap naming and install rule

This updates the libfmap .so filename to better match GNU convention
and also updates the soname (seen when running objdump -x). It also
updates the installation so that the package installs symbolic links.

(Note: There was also some disambiguation between the lib directory
 belonging to the system and the lib directory belonging to the source)

TEST=locally built for arm-generic and amd64-generic targets

Change-Id: Ib1002f20a1a324bd9583f617f59cf3804e06659c
1 file changed