Update reflection offset consistently for structure members

* Previously the offset was only updated with EOpIndexDirectStruct, but we also
  need to update it for the other index types into arrays, and when expanding an
  aggregate reached after dereferencing.

Test/reflection.vert

@@ -60,6 +60,14 @@ layout(std140) uniform nested {
     N3 foo;
 } nest;
 
+layout(std140) uniform nested2 {
+    vec4 padding; // offset 0, size 16
+    N3 a;       // offset 16, size 32
+    N1 b[4];    // offset 48, size 64
+    N1 c[2];    // offset 112, size 32
+    N1 d[4];    // offset 144, size 64
+} nest2;
+
 struct TS {
     int a;
     int dead;
@@ -203,4 +211,9 @@ void main()
     f += buf2i.runtimeArray[3].c;
     f += buf3i.runtimeArray[gl_InstanceID];
     f += buf4i.runtimeArray[gl_InstanceID].c;
+
+    N3 n = nest2.a;
+    N1 b[4] = nest2.b;
+    f += nest2.c[1].a;
+    f += nest2.d[gl_InstanceID].a;
 }