Annotate some SourceKit tests that fail on Linux.

* A bunch of them require objc_interop because they import code containing
  Objective-C.
* Many others fail on Ubuntu 14.04 because the C++ there doesn't have a
  functional std::regex implementation which is required by the
  `complete-test` tool.

It may be possible to adjust some of these tests in the future to not
need these extra requirements, but this is a straightforward way to
clean up Linux test results for now.

Author: briancroom

test/SourceKit/CodeComplete/complete_cache.swift

@@ -1,5 +1,6 @@
 import Foo
 
+// REQUIRES: objc_interop
 // RUN: rm -rf %t.ccp
 // RUN: %sourcekitd-test -req=complete.cache.ondisk -cache-path=%t.ccp == \
 // RUN:     -req=complete.open -pos=2:1 -req-opts=hidelowpriority=0 %s -- %s -F %S/../Inputs/libIDE-mock-sdk > %t.completions1

test/SourceKit/CodeComplete/complete_crash1.swift

@@ -1,3 +1,4 @@
+// XFAIL: broken_std_regex
 // RUN: %complete-test -tok=TOK1 -hide-none %s -- %s
 
 import QuartzCore

test/SourceKit/CodeComplete/complete_filter.swift

@@ -11,6 +11,7 @@ func foo() {
   x.#^FOO,,a,aa,ab,abc,abcd^#
 }
 
+// XFAIL: broken_std_regex
 // RUN: %sourcekitd-test -req=complete.open -pos=11:5 %s -- %s > %t.all
 // FileCheck -check-prefix=CHECK-ALL %s < %t.all
 // CHECK-ALL: key.name: "aaa

test/SourceKit/CodeComplete/complete_filter_rules.swift

@@ -10,6 +10,8 @@ struct TestHideName {
   func hideThis4(namedParam1 x: Int, namedParam2: Int) {}
   func dontHideThisByName() {}
 
+// XFAIL: broken_std_regex
+
 // RUN: %complete-test -filter-rules=%S/Inputs/filter-rules/hideNames.json -tok=HIDE_NAMES_1 %s -- -F %S/../Inputs/libIDE-mock-sdk | FileCheck %s -check-prefix=HIDE_NAMES
   func testHideName01() {
     #^HIDE_NAMES_1,hidethis^#

test/SourceKit/CodeComplete/complete_from_clang_module.swift

@@ -1,5 +1,6 @@
 import Foo
 
+// REQUIRES: objc_interop
 // RUN: %sourcekitd-test -req=complete -pos=2:1 %s -- %mcp_opt -F %S/../Inputs/libIDE-mock-sdk %s | FileCheck %s
 
 // CHECK-LABEL:      key.name: "fooIntVar",

test/SourceKit/CodeComplete/complete_fuzzy.swift

@@ -9,6 +9,8 @@ func footastic() {}
 
 // ===- Without a filter, we group.
 
+// XFAIL: broken_std_regex
+
 // RUN: %complete-test %s -group=stems -tok=TOP_LEVEL_NO_FILTER | FileCheck %s -check-prefix=TOP_LEVEL_NO_FILTER
 // RUN: %complete-test %s -group=stems -fuzz -tok=TOP_LEVEL_NO_FILTER | FileCheck %s -check-prefix=TOP_LEVEL_NO_FILTER
 func test1() {

test/SourceKit/CodeComplete/complete_group_overloads.swift

@@ -1,3 +1,5 @@
+// XFAIL: broken_std_regex
+
 struct A {}
 struct B {}
 

test/SourceKit/CodeComplete/complete_hide_low_priority.swift

@@ -1,3 +1,4 @@
+// XFAIL: broken_std_regex
 // RUN: %complete-test -hide-low-priority=1 -tok=TOP_LEVEL_0 %s -- -I %S/Inputs > %t.on
 // RUN: %complete-test -hide-low-priority=0 -tok=TOP_LEVEL_0 %s -- -I %S/Inputs > %t.off
 

test/SourceKit/CodeComplete/complete_import_module_flag.swift

@@ -1,3 +1,4 @@
+// XFAIL: broken_std_regex
 // RUN: mkdir -p %t
 // RUN: %swift -Xcc -I%S/Inputs -emit-module -o %t/auxiliary_file.swiftmodule %S/Inputs/auxiliary_file.swift
 // RUN: %complete-test -group=none -hide-none -raw -tok=TOP_LEVEL_0 %s -- -import-module auxiliary_file  -I %t -I %S/Inputs | FileCheck %s

test/SourceKit/CodeComplete/complete_inner.swift

@@ -1,3 +1,5 @@
+// XFAIL: broken_std_regex
+
 class Foo {}
 class Base {
   init() {}