Make base_unittests pass in gn/win/asan builds.

build/config/BUILD.gn

Index: build/config/BUILD.gn
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index 6a3133d9ecc6bcd02848a45b4a1803ce15627bf4..ef5c4338108eebb27241dfb3cfc0b9a01ef4fd56 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -408,6 +408,7 @@ config("executable_config") {
   if (use_locally_built_instrumented_libraries) {
     configs += [ "//third_party/instrumented_libraries:locally_built_ldflags" ]
   }
+  configs += [ "//build/config/sanitizers:link_executable" ]
 }
 
 # Shared library configs -------------------------------------------------------
@@ -434,6 +435,7 @@ config("shared_library_config") {
   if (use_locally_built_instrumented_libraries) {
     configs += [ "//third_party/instrumented_libraries:locally_built_ldflags" ]
   }
+  configs += [ "//build/config/sanitizers:link_shared_library" ]
 }
 
 # Add this config to your target to enable precompiled headers.