Attempting to fix HLSL failure

Author: andyleiserson

naga/tests/in/wgsl/pointer-function-arg.wgsl

@@ -1,3 +1,6 @@
+@compute @workgroup_size(1)
+fn main() {}
+
 fn takes_ptr(p: ptr<function, i32>) {}
 fn takes_array_ptr(p: ptr<function, array<i32, 4>>) {}
 fn takes_vec_ptr(p: ptr<function, vec2<i32>>) {}

naga/tests/out/hlsl/pointer-function-arg.hlsl

@@ -86,3 +86,8 @@ void let_binding(inout int a_1[4], uint i_7)
     return;
 }
 
+[numthreads(1, 1, 1)]
+void main()
+{
+    return;
+}

naga/tests/out/hlsl/pointer-function-arg.ron

@@ -4,5 +4,9 @@
     fragment:[
     ],
     compute:[
+        (
+            entry_point:"main",
+            target_profile:"cs_5_1",
+        ),
     ],
 )

naga/tests/out/msl/pointer-function-arg.msl

@@ -121,3 +121,8 @@ void let_binding(
     takes_ptr(a_1.inner[0]);
     return;
 }
+
+kernel void main_(
+) {
+    return;
+}

naga/tests/out/wgsl/pointer-function-arg.wgsl

@@ -70,3 +70,7 @@ fn let_binding(a_1: ptr<function, array<i32, 4>>, i_7: u32) {
     return;
 }
 
+@compute @workgroup_size(1, 1, 1) 
+fn main() {
+    return;
+}