ycmd: 2017-02-03 -> 2017-03-27

Now works with newer version of vim youcompleteme plugin.

Details:
- The OS X patch is no longer necessary as that code was removed upstream.
- It seems to want LLVM version 4 now.
- It annoyingly wants to symlink libclang.4 to libclang.4.0; nix already
  did this.

pkgs/development/tools/misc/ycmd/default.nix

@@ -7,12 +7,12 @@
 
 stdenv.mkDerivation rec {
   name = "ycmd-${version}";
-  version = "2017-02-03";
+  version = "2017-03-27";
 
   src = fetchgit {
     url = "git://github.com/Valloric/ycmd.git";
-    rev = "ec7a154f8fe50c071ecd0ac6841de8a50ce92f5d";
-    sha256 = "0rzxgqqqmmrv9r4k2ji074iprhw6sb0jkvh84wvi45yfyphsh0xi";
+    rev = "2ef1ae0d00a06a47fed3aacfd465a310e8bdb0d2";
+    sha256 = "0p5knlxgy66zi229ns1lfdhz5lram93vahmmk54w98fr3h8b1yfj";
   };
 
   buildInputs = [ cmake boost ]  ++ stdenv.lib.optional stdenv.isDarwin Cocoa;
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     ${python.interpreter} build.py --clang-completer --system-boost
   '';
 
-  patches = [ ./2-ycm-cmake.patch ];
+  patches = [ ./dont-symlink-clang.patch ];
 
   configurePhase = ":";