[clang] [Clang][Cygwin] Link default-manifest.o if exists (PR #220875)

[Tomohiro Kashiwada via cfe-commits]

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@@ -30,7 +31,7 @@
 // CHECK-STATIC-SAME: "-Bstatic"
 
 // RUN: %clang -### %s --target=i686-pc-cygwin --sysroot=%S/Inputs/basic_cygwin_tree \
-// RUN:   -shared 2>&1 | FileCheck --check-prefix=CHECK-SHARED %s
+// RUN:   -shared 2>&1 | FileCheck --check-prefix=CHECK-SHARED %s --implicit-check-not=default-manifest
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kikairoya wrote:

`-shared` and `-dll` disable embedding the manifest. Should this be mentioned explicitly in the PR description?

https://github.com/llvm/llvm-project/pull/220875