add n64emu. (#2175)

dist/info/n64emu_libretro.info

@@ -0,0 +1,13 @@
+display_name = "Nintendo - Nintendo 64 (n64emu)"
+corename = "n64emu"
+authors = "libretro/Mupen64Plus authors"
+supported_extensions = "n64|v64|z64|bin|u1"
+categories = "Emulator"
+systemname = "Nintendo 64"
+systemid = "n64"
+manufacturer = "Nintendo"
+database = "Nintendo - Nintendo 64"
+license = "GPLv2"
+display_version = "0.01"
+supports_no_game = "false"
+notes = "Cycle-based parallel-n64 fork"