cleanup: Move em only utils code into em directory

More separation of code for improvement of repository maintainability.

Change-Id: I4e77b472355066483cf646cdcd29e7ed660294a3
Signed-off-by: Christopher Meis <christopher.meis@9elements.com>
diff --git a/src/entity_manager/meson.build b/src/entity_manager/meson.build
index 005a0d0..622cf53 100644
--- a/src/entity_manager/meson.build
+++ b/src/entity_manager/meson.build
@@ -2,12 +2,13 @@
     'entity-manager',
     'entity_manager.cpp',
     'configuration.cpp',
-    '../expression.cpp',
+    'expression.cpp',
     'dbus_interface.cpp',
     'perform_scan.cpp',
     'perform_probe.cpp',
     'overlay.cpp',
     'topology.cpp',
+    'utils.cpp',
     '../utils.cpp',
     cpp_args: cpp_args + ['-DBOOST_ASIO_DISABLE_THREADS'],
     dependencies: [