Add missing backslash. Lost it in the conversion to regex

Author: cltnschlosser

validation-test/Driver/Dependencies/rdar23148987.swift

@@ -10,13 +10,13 @@
 // CHECK-1: {{^{$}}
 // CHECK-1-DAG: "kind"{{ ?}}: "began"
 // CHECK-1-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-1-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-1: {{^}$}}
 
 // CHECK-1: {{^{$}}
 // CHECK-1-DAG: "kind"{{ ?}}: "began"
 // CHECK-1-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-1-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-1: {{^}$}}
 
 // RUN: ls %t/ | %FileCheck -check-prefix=CHECK-LS %s
@@ -30,13 +30,13 @@
 // CHECK-1-SKIPPED: {{^{$}}
 // CHECK-1-SKIPPED-DAG: "kind"{{ ?}}: "skipped"
 // CHECK-1-SKIPPED-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-SKIPPED-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-1-SKIPPED-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-1-SKIPPED: {{^}$}}
 
 // CHECK-1-SKIPPED: {{^{$}}
 // CHECK-1-SKIPPED-DAG: "kind"{{ ?}}: "skipped"
 // CHECK-1-SKIPPED-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-SKIPPED-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-1-SKIPPED-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-1-SKIPPED: {{^}$}}
 
 // RUN: cp %S/Inputs/rdar23148987/helper-2.swift %t/helper.swift
@@ -47,13 +47,13 @@
 // CHECK-2: {{^{$}}
 // CHECK-2-DAG: "kind"{{ ?}}: "began"
 // CHECK-2-DAG: "name"{{ ?}}: "compile"
-// CHECK-2-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-2-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-2: {{^}$}}
 
 // CHECK-2: {{^{$}}
 // CHECK-2-DAG: "kind"{{ ?}}: "began"
 // CHECK-2-DAG: "name"{{ ?}}: "compile"
-// CHECK-2-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-2-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-2: {{^}$}}
 
 func test(obj: Test) {

validation-test/Driver/Dependencies/rdar25405605.swift

@@ -10,13 +10,13 @@
 // CHECK-1: {{^{$}}
 // CHECK-1-DAG: "kind"{{ ?}}: "began"
 // CHECK-1-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-1-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-1: {{^}$}}
 
 // CHECK-1: {{^{$}}
 // CHECK-1-DAG: "kind"{{ ?}}: "began"
 // CHECK-1-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-1-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-1: {{^}$}}
 
 // RUN: ls %t/ | %FileCheck -check-prefix=CHECK-LS %s
@@ -30,13 +30,13 @@
 // CHECK-1-SKIPPED: {{^{$}}
 // CHECK-1-SKIPPED-DAG: "kind"{{ ?}}: "skipped"
 // CHECK-1-SKIPPED-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-SKIPPED-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-1-SKIPPED-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-1-SKIPPED: {{^}$}}
 
 // CHECK-1-SKIPPED: {{^{$}}
 // CHECK-1-SKIPPED-DAG: "kind"{{ ?}} "skipped"
 // CHECK-1-SKIPPED-DAG: "name"{{ ?}}: "compile"
-// CHECK-1-SKIPPED-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-1-SKIPPED-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-1-SKIPPED: {{^}$}}
 
 // RUN: cp %S/Inputs/rdar25405605/helper-2.swift %t/helper.swift
@@ -47,13 +47,13 @@
 // CHECK-2: {{^{$}}
 // CHECK-2-DAG: "kind"{{ ?}}: "began"
 // CHECK-2-DAG: "name"{{ ?}}: "compile"
-// CHECK-2-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-2-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-2: {{^}$}}
 
 // CHECK-2: {{^{$}}
 // CHECK-2-DAG: "kind"{{ ?}}: "skipped"
 // CHECK-2-DAG: "name"{{ ?}}: "compile"
-// CHECK-2-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-2-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-2: {{^}$}}
 
 // RUN: cp %S/Inputs/rdar25405605/helper-3.swift %t/helper.swift
@@ -66,13 +66,13 @@
 // CHECK-3: {{^{$}}
 // CHECK-3-DAG: "kind"{{ ?}}: "began"
 // CHECK-3-DAG: "name"{{ ?}}: "compile"
-// CHECK-3-DAG: "{{(\.\/)?}}helper.swift"
+// CHECK-3-DAG: "{{(\.\\\/)?}}helper.swift"
 // CHECK-3: {{^}$}}
 
 // CHECK-3: {{^{$}}
 // CHECK-3-DAG: "kind"{{ ?}}: "began"
 // CHECK-3-DAG: "name"{{ ?}}: "compile"
-// CHECK-3-DAG: "{{(\.\/)?}}main.swift"
+// CHECK-3-DAG: "{{(\.\\\/)?}}main.swift"
 // CHECK-3: {{^}$}}
 
 func foo(_ value: Foo) -> Bool {