GLSL/SPV: no location on atomic_uint; Fix #1339.

Test/baseResults/spv.noBuiltInLoc.vert.out

 spv.noBuiltInLoc.vert
 // Module Version 10000
 // Generated by (magic number): 80006
-// Id's are bound by 33
+// Id's are bound by 35
 
                               Capability Shader
+                              Capability AtomicStorage
                1:             ExtInstImport  "GLSL.std.450"
                               MemoryModel Logical GLSL450
-                              EntryPoint Vertex 4  "main" 9 11 18 31 32
+                              EntryPoint Vertex 4  "main" 9 11 18 33 34
                               Source GLSL 450
                               Name 4  "main"
                               Name 9  "bar"
@@ -20,8 +21,9 @@ spv.noBuiltInLoc.vert
                               Name 24  "uv1"
                               Name 26  "uv2"
                               Name 29  "uv3"
-                              Name 31  "gl_VertexID"
-                              Name 32  "gl_InstanceID"
+                              Name 31  "a_uint"
+                              Name 33  "gl_VertexID"
+                              Name 34  "gl_InstanceID"
                               Decorate 9(bar) Location 0
                               Decorate 11(foo) Location 0
                               MemberDecorate 16(gl_PerVertex) 0 BuiltIn Position
@@ -35,8 +37,11 @@ spv.noBuiltInLoc.vert
                               Decorate 26(uv2) DescriptorSet 0
                               Decorate 29(uv3) Location 2
                               Decorate 29(uv3) DescriptorSet 0
-                              Decorate 31(gl_VertexID) BuiltIn VertexId
-                              Decorate 32(gl_InstanceID) BuiltIn InstanceId
+                              Decorate 31(a_uint) Offset 0
+                              Decorate 31(a_uint) DescriptorSet 0
+                              Decorate 31(a_uint) Binding 0
+                              Decorate 33(gl_VertexID) BuiltIn VertexId
+                              Decorate 34(gl_InstanceID) BuiltIn InstanceId
                2:             TypeVoid
                3:             TypeFunction 2
                6:             TypeFloat 32
@@ -60,9 +65,11 @@ spv.noBuiltInLoc.vert
               27:             TypeVector 6(float) 3
               28:             TypePointer UniformConstant 27(fvec3)
          29(uv3):     28(ptr) Variable UniformConstant
-              30:             TypePointer Input 19(int)
- 31(gl_VertexID):     30(ptr) Variable Input
-32(gl_InstanceID):     30(ptr) Variable Input
+              30:             TypePointer AtomicCounter 13(int)
+      31(a_uint):     30(ptr) Variable AtomicCounter
+              32:             TypePointer Input 19(int)
+ 33(gl_VertexID):     32(ptr) Variable Input
+34(gl_InstanceID):     32(ptr) Variable Input
          4(main):           2 Function None 3
                5:             Label
               12:    7(fvec4) Load 11(foo)

Test/spv.noBuiltInLoc.vert

@@ -10,6 +10,8 @@ uniform vec4 uv1;
 uniform float uv2;
 uniform vec3 uv3;
 
+layout(binding = 0) uniform atomic_uint a_uint;
+
 void main()
 {
     bar = foo;

glslang/MachineIndependent/iomapper.cpp

@@ -432,6 +432,7 @@ struct TDefaultIoResolverBase : public glslang::TIoMapResolver
         // no locations added if already present, a built-in variable, a block, or an opaque
         if (type.getQualifier().hasLocation() || type.isBuiltIn() ||
             type.getBasicType() == EbtBlock ||
+            type.getBasicType() == EbtAtomicUint ||
             (type.containsOpaque() && intermediate.getSpv().openGl == 0))
             return -1;