Re-add translation markers that were lost

When win32security.c was moved from src/backend/port/win32/security.c,
the message writing function was changed from write_stderr to log_error,
but nls.mk was not updated.  We could add log_error to GETTEXT_TRIGGERS,
but it's also used in src/common/exec.c in a different way and that
would create some confusion or a larger patch.  For now, just put an
explicit translation marker onto the strings that were previously
translated.

src/port/win32security.c

@@ -65,7 +65,7 @@ pgwin32_is_admin(void)
 
 	if (!OpenProcessToken(GetCurrentProcess(), TOKEN_READ, &AccessToken))
 	{
-		log_error("could not open process token: error code %lu\n",
+		log_error(_("could not open process token: error code %lu\n"),
 				  GetLastError());
 		exit(1);
 	}
@@ -86,7 +86,7 @@ pgwin32_is_admin(void)
 								  DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0,
 								  0, &AdministratorsSid))
 	{
-		log_error("could not get SID for Administrators group: error code %lu\n",
+		log_error(_("could not get SID for Administrators group: error code %lu\n"),
 				  GetLastError());
 		exit(1);
 	}
@@ -96,7 +96,7 @@ pgwin32_is_admin(void)
 								  DOMAIN_ALIAS_RID_POWER_USERS, 0, 0, 0, 0, 0,
 								  0, &PowerUsersSid))
 	{
-		log_error("could not get SID for PowerUsers group: error code %lu\n",
+		log_error(_("could not get SID for PowerUsers group: error code %lu\n"),
 				  GetLastError());
 		exit(1);
 	}