Bug 1900619 - Follow up to add include. r=smolnar

Differential Revision: https://phabricator.services.mozilla.com/D222014

security/manager/ssl/nsPKCS12Blob.cpp

@@ -8,6 +8,7 @@
 #include "mozilla/Casting.h"
 #include "mozilla/Logging.h"
 #include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_security.h"
 #include "mozilla/Unused.h"
 #include "mozpkix/pkixtypes.h"
 #include "nsIFile.h"