Fix framework_name option in build script

platforms/ios/build_framework.py

@@ -389,7 +389,7 @@ if __name__ == "__main__":
     parser.add_argument('--enable_nonfree', default=False, dest='enablenonfree', action='store_true', help='enable non-free modules (disabled by default)')
     parser.add_argument('--debug', default=False, dest='debug', action='store_true', help='Build "Debug" binaries (disabled by default)')
     parser.add_argument('--debug_info', default=False, dest='debug_info', action='store_true', help='Build with debug information (useful for Release mode: BUILD_WITH_DEBUG_INFO=ON)')
-    parser.add_argument('--framework_name', default='opencv2', dest='framework_name', action='store_true', help='Name of OpenCV framework (default: opencv2, will change to OpenCV in future version)')
+    parser.add_argument('--framework_name', default='opencv2', dest='framework_name', help='Name of OpenCV framework (default: opencv2, will change to OpenCV in future version)')
     parser.add_argument('--legacy_build', default=False, dest='legacy_build', action='store_true', help='Build legacy opencv2 framework (default: False, equivalent to "--framework_name=opencv2 --without=objc")')
     args = parser.parse_args()