Add SPIRV-Headers submodule
diff --git a/.gitmodules b/.gitmodules
index 0aaa2ac..49e4ebd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -45,3 +45,6 @@
[submodule "third_party/spirv_tools"]
path = third_party/spirv_tools
url = https://github.com/KhronosGroup/SPIRV-Tools.git
+[submodule "third_party/spirv_headers"]
+ path = third_party/spirv_headers
+ url = https://github.com/KhronosGroup/SPIRV-Headers.git
diff --git a/third_party/spirv_headers b/third_party/spirv_headers
new file mode 160000
index 0000000..b252a50
--- /dev/null
+++ b/third_party/spirv_headers
@@ -0,0 +1 @@
+Subproject commit b252a50953ac4375cb1864e94f4b0234db9d215d
