GLSL/SPV: Implement SPV_EXT_descriptor_indexing and GL_EXT_nonuniform_qualifier

Test/310runtimeArray.vert

@@ -0,0 +1,18 @@
+#version 310 es
+
+precision highp float;
+layout(location=0) out float o;
+
+struct S  { float f; };
+buffer b1 { S s[]; };
+buffer b2 { S s[]; } b2name;
+buffer b3 { S s[]; } b3name[];
+buffer b4 { S s[]; } b4name[4];
+
+void main()
+{
+  o = s[5].f;
+  o += b2name.s[6].f;
+  o += b3name[3].s[7].f;
+  o += b4name[2].s[8].f;
+}