GLSL: add .expected.glsl files for all tests.

Bug: tint:1301
Change-Id: Id3a591a2fa0dfdb112046d5c57defbae07483e0d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69480
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>

test/buffer/uniform/dynamic_index/read.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+precision mediump float;
+
+struct Inner {
+  ivec3 a;
+  int b;
+  uvec3 c;
+  uint d;
+  vec3 e;
+  float f;
+  ivec2 g;
+  ivec2 h;
+  mat2x3 i;
+  mat3x2 j;
+  ivec4 k[4];
+};
+
+layout (binding = 0) uniform S_1 {
+  Inner arr[8];
+} s;
+
+struct tint_symbol_2 {
+  uint idx;
+};
+
+void tint_symbol_inner(uint idx) {
+  ivec3 a = s.arr[idx].a;
+  int b = s.arr[idx].b;
+  uvec3 c = s.arr[idx].c;
+  uint d = s.arr[idx].d;
+  vec3 e = s.arr[idx].e;
+  float f = s.arr[idx].f;
+  ivec2 g = s.arr[idx].g;
+  ivec2 h = s.arr[idx].h;
+  mat2x3 i = s.arr[idx].i;
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void tint_symbol(tint_symbol_2 tint_symbol_1) {
+  tint_symbol_inner(tint_symbol_1.idx);
+  return;
+}
+void main() {
+  tint_symbol_2 inputs;
+  inputs.idx = uint(gl_LocalInvocationIndex);
+  tint_symbol(inputs);
+}
+
+

test/buffer/uniform/static_index/read.wgsl.expected.glsl

@@ -0,0 +1,46 @@
+#version 310 es
+precision mediump float;
+
+struct Inner {
+  int x;
+};
+struct tint_padded_array_element {
+  Inner el;
+};
+
+layout (binding = 0) uniform S_1 {
+  ivec3 a;
+  int b;
+  uvec3 c;
+  uint d;
+  vec3 e;
+  float f;
+  ivec2 g;
+  ivec2 h;
+  mat2x3 i;
+  mat3x2 j;
+  Inner k;
+  tint_padded_array_element l[4];
+} s;
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void tint_symbol() {
+  ivec3 a = s.a;
+  int b = s.b;
+  uvec3 c = s.c;
+  uint d = s.d;
+  vec3 e = s.e;
+  float f = s.f;
+  ivec2 g = s.g;
+  ivec2 h = s.h;
+  mat2x3 i = s.i;
+  mat3x2 j = s.j;
+  Inner k = s.k;
+  tint_padded_array_element l[4] = s.l;
+  return;
+}
+void main() {
+  tint_symbol();
+}
+
+