Rename SpirvShader_dbg.cpp -> SpirvShaderEnumNames.cpp

The `dbg` / `Debug` suffix is going to be used to implement
parts of the new Vulkan shader debugger.

Bug: b/145351270
Change-Id: Ifdd45692aa285ba7875b052857c2ea601f995da2
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38819
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
diff --git a/src/Pipeline/BUILD.gn b/src/Pipeline/BUILD.gn
index fdd76cb..cf74d42 100644
--- a/src/Pipeline/BUILD.gn
+++ b/src/Pipeline/BUILD.gn
@@ -38,10 +38,10 @@
     "SamplerCore.cpp",
     "SetupRoutine.cpp",
     "ShaderCore.cpp",
-    "SpirvShader_dbg.cpp",
     "SpirvShader.cpp",
     "SpirvShaderArithmetic.cpp",
     "SpirvShaderControlFlow.cpp",
+    "SpirvShaderEnumNames.cpp",
     "SpirvShaderGLSLstd450.cpp",
     "SpirvShaderGroup.cpp",
     "SpirvShaderImage.cpp",