plugin-api: resourced: Add plugin-api-resourced

plugin-api: resourced: Add plugin-api-resourced

This plugin api provides functions for resourced.
Provided functions:
 * plugin_resourced_low_memory_killer_get_backend: get backend library
 * plugin_resourced_low_memory_killer_put_backend: put backend library
 * plugin_resourced_low_memory_killer_get_kill_candidates: choose kill
   candidates from procs/apps list.

The files newly created during build due to this patch are as follows:
(arch=armv7l)

plugin-api-resourced-0.1.0-0.armv7l.rpm
 * /usr/lib: libplugin-api-resourced.so.0 -> libplugin-api-resourced.so.0.1.0
 * /usr/lib: libplugin-api-resourced.so.0.1.0
 * /usr/share/licenses/plugin-api/resourced: LICENSE.MIT

plugin-api-resourced-debuginfo-0.1.0-0.armv7l.rpm
 * /usr/lib/debug/usr/lib/libplugin-api-resourced.so.0.1.0.debug

libsyscommon-debugsource-5.0.0-0.armv7l.rpm
 * /usr/src/debug/libsyscommon-5.0.0-0.arm/src/plugin-api/resourced/include: plugin-resourced-memory-lmk-interface.h
 * /usr/src/debug/libsyscommon-5.0.0-0.arm/src/plugin-api/resourced/src: plugin-resourced-memory-lmk.c

plugin-api-resourced-devel-0.1.0-0.armv7l.rpm
 * /usr/include/plugin: plugin-resourced-memory-lmk.h
 * /usr/include/plugin: plugin-resourced-memory-lmk-interface.h
 * /usr/lib: libplugin-api-resourced.so -> libplugin-api-resourced.so.0
 * /usr/lib/pkgconfig: plugin-api-resourced.pc
 * /usr/share/licenses/plugin-api/resourced: LICENSE.MIT

Change-Id: I3f9c2deac1220131df5bb8a3db502b40dc1bdd72
Signed-off-by: SangYoun Kwak <sy.kwak@samsung.com>