remote: add missing include git2/remote.h

Otherwise we get an incomplete type error, since git_remote_callbacks
isn't declared yet.

src/fetch.c

@@ -5,7 +5,6 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
-#include "git2/remote.h"
 #include "git2/oid.h"
 #include "git2/refs.h"
 #include "git2/revwalk.h"

src/remote.c

@@ -5,7 +5,6 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
-#include "git2/remote.h"
 #include "git2/config.h"
 #include "git2/types.h"
 

src/remote.h

@@ -7,6 +7,8 @@
 #ifndef INCLUDE_remote_h__
 #define INCLUDE_remote_h__
 
+#include "git2/remote.h"
+
 #include "refspec.h"
 #include "transport.h"
 #include "repository.h"