[Test] Disabled Driver/linker.swift.

See rdar://problem/65281056 .

Author: nate-chandler

test/Driver/linker.swift

@@ -1,5 +1,6 @@
 // Must be able to run xcrun-return-self.sh
 // REQUIRES: shell
+// REQUIRES: rdar65281056
 // RUN: %swiftc_driver -sdk "" -driver-print-jobs -target x86_64-apple-macosx10.9 %s 2>&1 > %t.simple.txt
 // RUN: %FileCheck %s < %t.simple.txt
 // RUN: %FileCheck -check-prefix SIMPLE %s < %t.simple.txt