Tests: add a missed case of Windows exclusion

This mirrors the Linux and Android paths and excludes this test on
Windows.  With this change (and 1 workaround), we can fully execute the
test suite (though not yet pass it completely).

Tests/SwiftDocCTests/Utility/LMDBTests.swift

@@ -227,7 +227,7 @@ final class SwiftLMDBTests: XCTestCase {
     }
 
     func testArrayOfInt() throws {
-#if !os(Linux) && !os(Android)
+#if !os(Linux) && !os(Android) && !os(Windows)
         let database = try environment.openDatabase()
 
         var array: [UInt32] = []