Fix kdebugsettings categories file

By using the same EXPORT for ecm_qt_declare_logging_category and
ecm_qt_install_logging_categories.

(cherry picked from commit 5daccb83)

src/server/CMakeLists.txt

@@ -77,7 +77,7 @@ ecm_qt_declare_logging_category(SERVER_LIB_SRCS
     CATEGORY_NAME kwayland-server
     DEFAULT_SEVERITY Critical
     DESCRIPTION "KWayland Server Library"
-    EXPORT KWAYLAND
+    EXPORT KWAYLANDSERVER
 )
 
 ecm_add_qtwayland_server_protocol_kde(SERVER_LIB_SRCS