Moved <js-module> to <platform name="ios"> tag, so the JS module …

…is only loaded and included on iOS and not on all platforms

plugin.xml

@@ -18,10 +18,6 @@
 		<engine name="cordova-ios" version=">=3.8.0" />
 	</engines>
 
-	<js-module src="dist/cordova-plugin-iosrtc.js" name="Plugin">
-		<clobbers target="cordova.plugins.iosrtc" />
-	</js-module>
-
 	<platform name="ios">
 		<config-file target="config.xml" parent="/*">
 			<feature name="iosrtcPlugin">
@@ -30,6 +26,10 @@
 			</feature>
 		</config-file>
 
+		<js-module src="dist/cordova-plugin-iosrtc.js" name="Plugin">
+			<clobbers target="cordova.plugins.iosrtc" />
+		</js-module>
+
 		<!-- WebRTC ObjetiveC headers -->
 		<header-file src="src/webrtc-headers/RTCAVFoundationVideoSource.h" />
 		<header-file src="src/webrtc-headers/RTCAudioSource.h" />