[SECURITY] Fedora 26 Update: mingw-curl-7.54.1-1.fc26

cURL is a tool for getting files from HTTP, FTP, FILE, LDAP, LDAPS, DICT, TELNET and TFTP servers, using any of the supported protocols. cURL is designed to work without user interaction or any kind of interactivity. cURL offers many useful capabilities, like proxy support, user authentication, FTP upload, HTTP post, and file transfer resume. This is the MinGW cross-compiled Windows library.