[swift-mode] require flymake-proc

Author: adrian-prantl

utils/swift-mode.el

@@ -503,6 +503,7 @@ directory."
              (funcall swift-find-executable-fn "swiftc")
              temp-file)))
 
+(require 'flymake-proc)
 (add-to-list 'flymake-allowed-file-name-masks '(".+\\.swift$" flymake-swift-init))
 
 (setq flymake-err-line-patterns