Remove test.wgsl, add to .gitignore

Accidental commit of my test file for checking tint behavior.
Add to the .gitignore file so I don't accidentally check this in again.

Change-Id: Ie67f04cc307fa180d3a65d867a1777d008be8e17
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70981
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>

.gitignore

@@ -6,7 +6,6 @@
 .vscode/*
 !.vscode/tasks.json
 .idea
-/build*/
 buildtools
 cmake-build-*/
 coverage.summary
@@ -25,3 +24,6 @@ third_party/spirv-headers
 third_party/spirv-tools
 tools/clang
 tools/bin
+
+/build*/
+/test.wgsl

test.wgsl

@@ -1,15 +0,0 @@
-[[block]]
-struct SB {
-  x : i32;
-  arr : array<i32>;
-};
-
-[[group(0), binding(0)]] var<storage, read> sb : SB;
-
-[[stage(compute), workgroup_size(1)]]
-fn main() {
-  var a : u32 = arrayLength(&sb.arr);
-  let p = &sb;
-  let sb2 = p;
-  var b : u32 = arrayLength(&((*sb2).arr));
-}