Split debug opcode validation into new file
* Removes debug opcode validation from idUsage and puts it in a separate
file
* minor updates
diff --git a/BUILD.gn b/BUILD.gn
index 91b6929..6ad8f7d 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -369,6 +369,7 @@
"source/val/validate_composites.cpp",
"source/val/validate_conversion.cpp",
"source/val/validate_datarules.cpp",
+ "source/val/validate_debug.cpp",
"source/val/validate_decorations.cpp",
"source/val/validate_derivatives.cpp",
"source/val/validate_ext_inst.cpp",