change deployment target to iOS 5

(because socket-rocket needs it and we're using __weak now)

Author: pkyeck

SocketTesterARC.xcodeproj/project.pbxproj

@@ -364,7 +364,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 4.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 			};
@@ -387,7 +387,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 4.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_CFLAGS = "-DNS_BLOCK_ASSERTIONS=1";
 				SDKROOT = iphoneos;