Skip /Applications symlink script for Debug builds (#1443)

Task/Issue URL: https://app.asana.com/0/1203301625297703/1205226515221343/f

Description:
Run the /Applications symlink script only on Debug builds because it has unexpected
and severe consequences when run in Release configuration (such as deleting the
production release app bundle).

DuckDuckGo.xcodeproj/project.pbxproj

@@ -7429,7 +7429,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "# if Xcode created real Applications directory inside BUILT_PRODUCTS_DIR \nif [[ ! -L ${BUILT_PRODUCTS_DIR}/Applications ]]; then\n    # we only get here on clean build, remove an existing app in /Applications/DEBUG on clean build\n    echo \"rm -rf /${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n    rm -rf \"/${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n\n    # create /Applications/DEBUG dir\n    echo \"mkdir -p /${INSTALL_PATH}\"\n    mkdir -p \"/${INSTALL_PATH}\"\n\n    # move the app bundle to /Applications/DEBUG\n    echo \"mv ${DSTROOT}/${INSTALL_PATH}/${PRODUCT_NAME}.app /${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n    mv \"${DSTROOT}/${INSTALL_PATH}/${PRODUCT_NAME}.app\" \"/${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n\n    # rm ${BUILT_PRODUCTS_DIR}/Applications directory created by Xcode\n    echo \"rm -rf ${BUILT_PRODUCTS_DIR}/Applications\" \n    rm -rf \"${BUILT_PRODUCTS_DIR}/Applications\"\n    # create ${BUILT_PRODUCTS_DIR}/Applications symlink to /Applications\n    echo \"ln -s /Applications ${BUILT_PRODUCTS_DIR}/Applications\"\n    ln -s /Applications \"${BUILT_PRODUCTS_DIR}/Applications\"\nfi\n";
+			shellScript = "if [[ \"${CONFIGURATION}\" != \"Debug\" ]]; then\n    # run only for Debug builds\n    exit 0\nfi\n\n# if Xcode created real Applications directory inside BUILT_PRODUCTS_DIR \nif [[ ! -L ${BUILT_PRODUCTS_DIR}/Applications ]]; then\n    # we only get here on clean build, remove an existing app in /Applications/DEBUG on clean build\n    echo \"rm -rf /${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n    rm -rf \"/${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n\n    # create /Applications/DEBUG dir\n    echo \"mkdir -p /${INSTALL_PATH}\"\n    mkdir -p \"/${INSTALL_PATH}\"\n\n    # move the app bundle to /Applications/DEBUG\n    echo \"mv ${DSTROOT}/${INSTALL_PATH}/${PRODUCT_NAME}.app /${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n    mv \"${DSTROOT}/${INSTALL_PATH}/${PRODUCT_NAME}.app\" \"/${INSTALL_PATH}/${PRODUCT_NAME}.app\"\n\n    # rm ${BUILT_PRODUCTS_DIR}/Applications directory created by Xcode\n    echo \"rm -rf ${BUILT_PRODUCTS_DIR}/Applications\" \n    rm -rf \"${BUILT_PRODUCTS_DIR}/Applications\"\n    # create ${BUILT_PRODUCTS_DIR}/Applications symlink to /Applications\n    echo \"ln -s /Applications ${BUILT_PRODUCTS_DIR}/Applications\"\n    ln -s /Applications \"${BUILT_PRODUCTS_DIR}/Applications\"\nfi\n";
 		};
 		CBCCF59E299667B700C02DFE /* Assert Xcode version */ = {
 			isa = PBXShellScriptBuildPhase;