Modify testing to only record validation pass/fail

* Changed unit tests to only record known the validation pass/fail
status
 * errors are output as part of the failure message if the result is
 unexpected
 * can turn off validation for each test individually
* Moved some SPV_KHR_vulkan_memory_model tests to be compiled for Vulkan
1.1

Test/baseResults/hlsl.partialInit.frag.out

@@ -398,10 +398,7 @@ gl_FragCoord origin is upper left
 0:?     'ci' ( const int)
 0:?       0 (const int)
 
-error: SPIRV-Tools Validation Errors
-error: If OpTypeBool is stored in conjunction with OpVariable, it can only be used with non-externally visible shader Storage Classes: Workgroup, CrossWorkgroup, Private, and Function
-  %_entryPointOutput_c = OpVariable %_ptr_Output_bool Output
-
+Validation failed
 // Module Version 10000
 // Generated by (magic number): 80007
 // Id's are bound by 104