SPV Version: Emit the requested SPIR-V version, not the header version.

Fixes #1236.
diff --git a/Test/baseResults/hlsl.structbuffer.fn2.comp.out b/Test/baseResults/hlsl.structbuffer.fn2.comp.out
index f5358a4..994ecf1 100644
--- a/Test/baseResults/hlsl.structbuffer.fn2.comp.out
+++ b/Test/baseResults/hlsl.structbuffer.fn2.comp.out
@@ -133,7 +133,7 @@
 0:?     'g_output' (layout( binding=1 rg32ui) uniform uimageBuffer)
 0:?     'dispatchId' ( in uint GlobalInvocationID)
 
-// Module Version 10200
+// Module Version 10000
 // Generated by (magic number): 80003
 // Id's are bound by 61