test1422: add required file feature

curl configured with --enable-debug --disable-file currently complains
on test1422:
Info: Protocol "file" not supported or disabled in libcurl

Make test1422 dependend on enabled FILE protocol to fix this.

Fixes curl#2741
Closes

tests/data/test1422

@@ -10,14 +10,14 @@ HTTP GET
 #
 <reply>
 <data nocheck="yes">
-HTTP/1.1 200 OK
-Date: Thu, 09 Nov 2010 14:49:00 GMT
-Server: test-server/fake
-Content-Length: 0
-Connection: close
-Content-Type: text/html
-Content-Disposition: filename=name1422; charset=funny; option=str//nge
-
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Content-Disposition: filename=name1422; charset=funny; option=str//nge
+
 </data>
 </reply>
 
@@ -28,6 +28,7 @@ Content-Disposition: filename=name1422; charset=funny; option=str//nge
 # -O and -J output in, using the CURL_TESTDIR variable
 <features>
 debug
+file
 </features>
 <server>
 http
@@ -50,10 +51,10 @@ http://%HOSTIP:%HTTPPORT/1422 -J -O file://%PWD/log/name1422
 ^User-Agent:.*
 </strip>
 <protocol>
-GET /1422 HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-Accept: */*
-
+GET /1422 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
 </protocol>
 
 <file1 name="log/name1422">