Unique method names in computeboids

WebGPU requires unique entry point names.

Change-Id: I0dc5123abdc1a4da343b60460443498f8611d7b9
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/21021
Reviewed-by: David Neto <dneto@google.com>
diff --git a/test/compute_boids.wgsl b/test/compute_boids.wgsl
index c937df1..b3a7b7e 100644
--- a/test/compute_boids.wgsl
+++ b/test/compute_boids.wgsl
@@ -29,7 +29,7 @@
   gl_Position = vec4<f32>(pos + a_particlePos, 0.0, 1.0);
   return;
 }
-entry_point vertex as "main" = vtx_main;
+entry_point vertex as "vert_main" = vtx_main;
 
 # fragment shader
 [[location 0]] var<out> fragColor : vec4<f32>;
@@ -38,7 +38,7 @@
   fragColor = vec4<f32>(1.0, 1.0, 1.0, 1.0);
   return;
 }
-entry_point fragment as "main" = frag_main;
+entry_point fragment as "frag_main" = frag_main;
 
 # compute shader
 type Particle = struct {
@@ -149,5 +149,5 @@
 
   return;
 }
-entry_point compute as "main" = compute_main;
+entry_point compute as "comp_main" = compute_main;