SPV: Don't decorate locations within an array, it doesn't make sense.

This fixes issue #360.

Test/baseResults/spv.450.tesc.out

@@ -0,0 +1,50 @@
+spv.450.tesc
+Warning, version 450 is not yet complete; most version-specific features are present, but some are missing.
+
+
+Linked tessellation control stage:
+
+
+// Module Version 10000
+// Generated by (magic number): 80001
+// Id's are bound by 17
+
+                              Capability Tessellation
+               1:             ExtInstImport  "GLSL.std.450"
+                              MemoryModel Logical GLSL450
+                              EntryPoint TessellationControl 4  "main" 9 16
+                              ExecutionMode 4 OutputVertices 4
+                              Source GLSL 450
+                              Name 4  "main"
+                              Name 9  "patchOut"
+                              Name 10  "S"
+                              MemberName 10(S) 0  "sMem1"
+                              MemberName 10(S) 1  "sMem2"
+                              Name 11  "TheBlock"
+                              MemberName 11(TheBlock) 0  "bMem1"
+                              MemberName 11(TheBlock) 1  "bMem2"
+                              MemberName 11(TheBlock) 2  "s"
+                              Name 16  "tcBlock"
+                              Decorate 9(patchOut) Patch
+                              MemberDecorate 11(TheBlock) 0 Patch
+                              MemberDecorate 11(TheBlock) 1 Patch
+                              MemberDecorate 11(TheBlock) 2 Patch
+                              Decorate 11(TheBlock) Block
+                              Decorate 16(tcBlock) Location 12
+               2:             TypeVoid
+               3:             TypeFunction 2
+               6:             TypeFloat 32
+               7:             TypeVector 6(float) 4
+               8:             TypePointer Output 7(fvec4)
+     9(patchOut):      8(ptr) Variable Output
+           10(S):             TypeStruct 6(float) 6(float)
+    11(TheBlock):             TypeStruct 6(float) 6(float) 10(S)
+              12:             TypeInt 32 0
+              13:     12(int) Constant 2
+              14:             TypeArray 11(TheBlock) 13
+              15:             TypePointer Output 14
+     16(tcBlock):     15(ptr) Variable Output
+         4(main):           2 Function None 3
+               5:             Label
+                              Return
+                              FunctionEnd

Test/spv.450.tesc

@@ -0,0 +1,20 @@
+#version 450 core
+
+layout(vertices = 4) out;
+
+patch out vec4 patchOut;
+
+struct S {
+    float sMem1;  // should not see a patch decoration
+    float sMem2;  // should not see a patch decoration
+};
+
+layout(location = 12) patch out TheBlock {
+    highp float bMem1;  // should not see a location decoration
+    highp float bMem2;
+    S s;                // should see a patch decoration
+} tcBlock[2];
+
+void main()
+{
+}