[EmbedFrameworksScript] Only manually copy swift runtime libs in Xcode 6

lib/cocoapods/generator/embed_frameworks_script.rb

@@ -79,14 +79,16 @@ module Pod
             # Resign the code if required by the build settings to avoid unstable apps
             code_sign_if_enabled "${destination}/$(basename "$1")"
 
-            # Embed linked Swift runtime libraries
-            local swift_runtime_libs
-            swift_runtime_libs=$(xcrun otool -LX "$binary" | grep --color=never @rpath/libswift | sed -E s/@rpath\\\\/\\(.+dylib\\).*/\\\\1/g | uniq -u  && exit ${PIPESTATUS[0]})
-            for lib in $swift_runtime_libs; do
-              echo "rsync -auv \\"${SWIFT_STDLIB_PATH}/${lib}\\" \\"${destination}\\""
-              rsync -auv "${SWIFT_STDLIB_PATH}/${lib}" "${destination}"
-              code_sign_if_enabled "${destination}/${lib}"
-            done
+            # Embed linked Swift runtime libraries. No longer necessary as of Xcode 7.
+            if [ "${XCODE_VERSION_MAJOR}" -lt 7 ]; then
+              local swift_runtime_libs
+              swift_runtime_libs=$(xcrun otool -LX "$binary" | grep --color=never @rpath/libswift | sed -E s/@rpath\\\\/\\(.+dylib\\).*/\\\\1/g | uniq -u  && exit ${PIPESTATUS[0]})
+              for lib in $swift_runtime_libs; do
+                echo "rsync -auv \\"${SWIFT_STDLIB_PATH}/${lib}\\" \\"${destination}\\""
+                rsync -auv "${SWIFT_STDLIB_PATH}/${lib}" "${destination}"
+                code_sign_if_enabled "${destination}/${lib}"
+              done
+            fi
           }
 
           # Signs a framework with the provided identity