Add zlib repository

.gitmodules

@@ -19,3 +19,6 @@
 [submodule "third_party/libav"]
 	path = third_party/libav
 	url = https://github.com/xenia-project/libav.git
+[submodule "third_party/zlib"]
+	path = third_party/zlib
+	url = https://github.com/madler/zlib

premake5.lua

@@ -164,6 +164,7 @@ solution("xenia")
   include("third_party/imgui.lua")
   include("third_party/libav.lua")
   include("third_party/xxhash.lua")
+  include("third_party/zlib.lua")
   include("build_tools/third_party/gflags.lua")
 
   include("src/xenia")

third_party/zlib

@@ -0,0 +1 @@
+Subproject commit 50893291621658f355bc5b4d450a8d06a563053d

third_party/zlib.lua

@@ -0,0 +1,41 @@
+group("third_party")
+project("zlib")
+  uuid("AF89D75F-F723-47B1-9E29-29CDFA58CCAA")
+  kind("StaticLib")
+  language("C")
+  links({
+  })
+  defines({
+    "_LIB",
+  })
+  includedirs({
+    "zlib",
+  })
+  files({
+    "zlib/adler32.c",
+    "zlib/compress.c",
+    "zlib/crc32.c",
+    "zlib/crc32.h",
+    "zlib/deflate.c",
+    "zlib/deflate.h",
+    "zlib/gzclose.c",
+    "zlib/gzguts.h",
+    "zlib/gzlib.c",
+    "zlib/gzread.c",
+    "zlib/gzwrite.c",
+    "zlib/infback.c",
+    "zlib/inffast.c",
+    "zlib/inffast.h",
+    "zlib/inffixed.h",
+    "zlib/inflate.c",
+    "zlib/inflate.h",
+    "zlib/inftrees.c",
+    "zlib/inftrees.h",
+    "zlib/trees.c",
+    "zlib/trees.h",
+    "zlib/uncompr.c",
+    "zlib/zconf.h",
+    "zlib/zlib.h",
+    "zlib/zutil.c",
+    "zlib/zutil.h",
+  })