Disable test/AutolinkExtract/import.swift

It started failing after #15408.

SR-7255
rdar://38751453

Author: aschwaighofer

test/AutolinkExtract/import.swift

@@ -3,6 +3,8 @@
 // RUN: %target-swiftc_driver -c %s -I %t -o %t/import_experimental.o
 // RUN: %target-swift-autolink-extract %t/import_experimental.o -o - | %FileCheck --check-prefix CHECK-%target-object-format %s
 
+// REQUIRES: SR7255
+
 // REQUIRES: autolink-extract
 
 // CHECK-elf-DAG: -lswiftCore