[xswiftbus] Using raw string literal delimiter so parentheses can be embedded in the XML

src/xswiftbus/org.swift_project.xswiftbus.service.xml

@@ -1,4 +1,4 @@
-R"(<node>
+R"XML(<node>
   <interface name="org.swift_project.xswiftbus.service">
     <method name="getVersionNumber">
       <arg type="s" direction="out"/>
@@ -178,4 +178,4 @@ R"(<node>
     <method name="toggleMessageBoxVisibility">
     </method>
   </interface>
-</node>)"
+</node>)XML"

src/xswiftbus/org.swift_project.xswiftbus.traffic.xml

@@ -1,4 +1,4 @@
-R"(<node>
+R"XML(<node>
   <interface name="org.swift_project.xswiftbus.traffic">
     <method name="acquireMultiplayerPlanes">
       <arg name="acquired" type="b" direction="out"/>
@@ -93,4 +93,4 @@ R"(<node>
        <arg name="callsign" type="s" direction="in"/>
     </method>
   </interface>
-</node>)"
+</node>)XML"

src/xswiftbus/org.swift_project.xswiftbus.weather.xml

@@ -1,4 +1,4 @@
-R"(<node>
+R"XML(<node>
   <interface name="org.swift_project.xswiftbus.weather">
     <method name="isUsingRealWeather">
       <arg type="b" direction="out"/>
@@ -47,4 +47,4 @@ R"(<node>
       <arg name="turbulence" type="i" direction="in"/>
     </method>
   </interface>
-</node>)"
+</node>)XML"