gn build: Fix Windows builds after r357797

llvm-svn: 358004

llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp

@@ -853,7 +853,7 @@ RuntimeDyldChecker::RuntimeDyldChecker(
                       MCDisassembler *Disassembler,
                       MCInstPrinter *InstPrinter,
                       raw_ostream &ErrStream)
-    : Impl(llvm::make_unique<RuntimeDyldCheckerImpl>(
+    : Impl(::llvm::make_unique<RuntimeDyldCheckerImpl>(
                                             std::move(IsSymbolValid),
                                             std::move(GetSymbolAddress),
                                             std::move(GetSymbolContent),

llvm/utils/gn/build/BUILD.gn

@@ -139,7 +139,9 @@ config("compiler_defaults") {
 }
 
 config("no_exceptions") {
-  cflags_cc = [ "-fno-exceptions" ]
+  if (host_os != "win") {
+    cflags_cc = [ "-fno-exceptions" ]
+  }
 }
 
 config("no_rtti") {