[gn] Fix build on macos

[yannic]

Summary

This fixes an error when running llvm/utils/gn/gn.py gen out/gn on macos:

ERROR at //llvm/tools/dsymutil/BUILD.gn:33:14: Unsupported value in libs.
    libs = [ "CoreFoundation.framework" ]
             ^-------------------------
Use frameworks to list framework dependencies.
See //llvm/test/BUILD.gn:205:5: which caused the file to be included.
    "//llvm/tools/dsymutil",
    ^----------------------

[markmentovai]

→ https://reviews.llvm.org/D84219

[yannic]

Fixed by https://reviews.llvm.org/D84219

llvm/utils/gn/secondary/llvm/tools/dsymutil/BUILD.gn

sources = [
     "DwarfLinkerForBinary.cpp",
     "MachODebugMapParser.cpp",
     "MachOUtils.cpp",
     "Reproducer.cpp",
     "SymbolMap.cpp",
     "dsymutil.cpp",
   ]
   if (host_os == "mac") {
-    libs = [ "CoreFoundation.framework" ]
+    frameworks = [ "CoreFoundation.framework" ]
   }
 }