Use ln with -f option for creating mvim symbolic link

Author: splhack

src/MacVim/MacVim.xcodeproj/project.pbxproj

@@ -625,7 +625,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "BINPATH=$BUILT_PRODUCTS_DIR/$CONTENTS_FOLDER_PATH/bin\nmkdir -p $BINPATH\ncp -a $SRCROOT/mvim $BINPATH/mvim\nchmod 755 $BINPATH/mvim\n(cd $BINPATH; for f in vim vimdiff view gvim gvimdiff gview mvimdiff mview; do ln -s mvim $f; done)";
+			shellScript = "BINPATH=$BUILT_PRODUCTS_DIR/$CONTENTS_FOLDER_PATH/bin\nmkdir -p $BINPATH\ncp -a $SRCROOT/mvim $BINPATH/mvim\nchmod 755 $BINPATH/mvim\n(cd $BINPATH; for f in vim vimdiff view gvim gvimdiff gview mvimdiff mview; do ln -fs mvim $f; done)";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */