Revert "Disable module lookup, let's see if that helps"

This reverts commit e7111a5.

Author: grynspan

Tests/TestingTests/ABIEntryPointTests.swift

@@ -185,13 +185,13 @@ private func withTestingLibraryImageAddress<R>(_ body: (ImageAddress?) throws ->
 #elseif os(Linux) || os(FreeBSD) || os(Android)
   // When using glibc, dladdr() is only available if __USE_GNU is specified.
 #elseif os(Windows)
-//  let flags = DWORD(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)
-//  try addressInTestingLibrary.withMemoryRebound(to: wchar_t.self, capacity: MemoryLayout<UnsafeRawPointer>.stride / MemoryLayout<wchar_t>.stride) { addressInTestingLibrary in
-//    try #require(GetModuleHandleExW(flags, addressInTestingLibrary, &testingLibraryAddress))
-//  }
-//  defer {
-//    FreeLibrary(testingLibraryAddress)
-//  }
+  let flags = DWORD(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)
+  try addressInTestingLibrary.withMemoryRebound(to: wchar_t.self, capacity: MemoryLayout<UnsafeRawPointer>.stride / MemoryLayout<wchar_t>.stride) { addressInTestingLibrary in
+    try #require(GetModuleHandleExW(flags, addressInTestingLibrary, &testingLibraryAddress))
+  }
+  defer {
+    FreeLibrary(testingLibraryAddress)
+  }
 #else
 #warning("Platform-specific implementation missing: cannot find the testing library image the test suite is linked against")
 #endif