Bug 1514425 - Disable test_constructor.html on linux for frequent failures. r=jmaher

dom/payments/test/mochitest.ini

@@ -38,6 +38,7 @@ run-if = nightly_build # Bug 1390737: Depends on the Nightly-only UI service
 skip-if = debug # Bug 1507251 - Leak
 [test_closePayment.html]
 [test_constructor.html]
+skip-if = (os == "linux") # Bug 1514425
 [test_currency_amount_validation.html]
 skip-if = (verify && debug)
 [test_payerDetails.html]