re-enable SSL-related unit tests on Windows

BUG=None

Change-Id: If2bb0500a3edbafe6b0ae176d29d402d26f2209e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/318780
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Christoffer Jansson <jansson@google.com>
Cr-Commit-Position: refs/heads/main@{#40748}
diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index 80ab5a6..fdc2adf 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -2138,7 +2138,7 @@
         sources += [ "win32_unittest.cc" ]
         deps += [ ":win32" ]
       }
-      if (is_posix || is_fuchsia) {
+      if (is_posix || is_fuchsia || is_win) {
         sources += [
           "openssl_adapter_unittest.cc",
           "openssl_session_cache_unittest.cc",