[WebAssembly] Fix a typo in a test file name

test/CodeGen/WebAssembly/add-prototypes-conflict.ll

 ; RUN: opt -S -wasm-add-missing-prototypes -o %t.ll %s 2>&1 | FileCheck %s -check-prefix=WARNING
 ; RUN: cat %t.ll | FileCheck %s
 
 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
 target triple = "wasm32-unknown-unknown"
 
 ; WARNING: warning: prototype-less function used with conflicting signatures: foo
 
 ; CHECK-LABEL: @call_with_conflicting_prototypes
 ; CHECK: %call1 = call i64 bitcast (i64 (i32, i32)* @foo to i64 (i32)*)(i32 42)
 ; CHECK: %call2 = call i64 @foo(i32 42, i32 43)
 define void @call_with_conflicting_prototypes() {
   %call1 = call i64 bitcast (i64 (...)* @foo to i64 (i32)*)(i32 42)
   %call2 = call i64 bitcast (i64 (...)* @foo to i64 (i32, i32)*)(i32 42, i32 43)
   ret void
 }
 
 ; CHECK: declare extern_weak i64 @foo(i32, i32)
 declare extern_weak i64 @foo(...) #1
 
 ; CHECK-NOT: attributes {{.*}} = { {{.*}}"no-prototype"{{.*}} }
 attributes #1 = { "no-prototype" }