Adding a subset of the glslang repo dealing with spirv.

The main repo is a mess.

third_party/glslang-spirv.lua

@@ -0,0 +1,29 @@
+group("third_party")
+project("glslang-spirv")
+  uuid("1cc8f45e-91e2-4daf-a55e-666bf8b5e6b2")
+  kind("StaticLib")
+  language("C++")
+  links({
+  })
+  defines({
+    "_LIB",
+  })
+  includedirs({
+  })
+  files({
+    "glslang-spirv/disassemble.cpp",
+    "glslang-spirv/disassemble.h",
+    "glslang-spirv/doc.cpp",
+    "glslang-spirv/doc.h",
+    "glslang-spirv/GLSL.std.450.h",
+    -- Disabled until required.
+    -- "glslang-spirv/GlslangToSpv.cpp",
+    -- "glslang-spirv/GlslangToSpv.h",
+    "glslang-spirv/InReadableOrder.cpp",
+    "glslang-spirv/spirv.hpp",
+    "glslang-spirv/SpvBuilder.cpp",
+    "glslang-spirv/SpvBuilder.h",
+    "glslang-spirv/spvIR.h",
+    "glslang-spirv/SPVRemapper.cpp",
+    "glslang-spirv/SPVRemapper.h",
+  })