display: Move plugin-common files to core(src/display)

The source code display-actor.c has been relocated:
 - src/display/plugin-common/display-actor.c
   => src/display/display-actor.c
 - src/display/plugin-common/display-ops.c
   => src/display/display-ops.c
 - src/display/plugin-common/slave-logging.c
   => src/display/slave-logging.c
- src/display/plugin-common/display-signal.c
  => src/display/display-signal.c

To remove display build dependency between plugin and core, thie file is relocated.

Change-Id: Ia6e5e2e1771ee4ebdb84339dcda55973e6888241
Signed-off-by: Yunhee Seo <yuni.seo@samsung.com>

diff --git a/src/display/plugin-common/display-actor.c b/src/display/display-actor.c
similarity index 100%
rename from src/display/plugin-common/display-actor.c
rename to src/display/display-actor.c

diff --git a/src/display/plugin-common/display-actor.h b/src/display/display-actor.h
similarity index 100%
rename from src/display/plugin-common/display-actor.h
rename to src/display/display-actor.h

diff --git a/src/display/plugin-common/display-ops.c b/src/display/display-ops.c
similarity index 100%
rename from src/display/plugin-common/display-ops.c
rename to src/display/display-ops.c

diff --git a/src/display/plugin-common/display-ops.h b/src/display/display-ops.h
similarity index 100%
rename from src/display/plugin-common/display-ops.h
rename to src/display/display-ops.h

diff --git a/src/display/plugin-common/display-signal.c b/src/display/display-signal.c
similarity index 100%
rename from src/display/plugin-common/display-signal.c
rename to src/display/display-signal.c

diff --git a/src/display/plugin-common/display-signal.h b/src/display/display-signal.h
similarity index 100%
rename from src/display/plugin-common/display-signal.h
rename to src/display/display-signal.h

diff --git a/src/display/plugin-common/slave-logging.c b/src/display/slave-logging.c
similarity index 100%
rename from src/display/plugin-common/slave-logging.c
rename to src/display/slave-logging.c