MobileVLCKit: fixed compilation with Xcode 4.5 if a Simulator build wasn't done prior to build for Device

MobileVLCKit.xcodeproj/project.pbxproj

@@ -305,6 +305,7 @@
 				INSTALL_PATH = /usr/local/lib;
 				IPHONEOS_DEPLOYMENT_TARGET = 5.1;
 				PRODUCT_NAME = MobileVLCKit;
+				VALID_ARCHS = armv7;
 				VLC_SRC_DIR = "$(PROJECT_DIR)/../vlc";
 			};
 			name = Debug;
@@ -323,6 +324,7 @@
 				INSTALL_PATH = /usr/local/lib;
 				IPHONEOS_DEPLOYMENT_TARGET = 5.1;
 				PRODUCT_NAME = MobileVLCKit;
+				VALID_ARCHS = armv7;
 				VLC_SRC_DIR = "$(PROJECT_DIR)/../vlc";
 			};
 			name = Release;