Fix indexstore test paths on Windows

Author: DavidGoldman

test/SourceKit/Indexing/indexstore_multifile.swift

@@ -16,8 +16,8 @@ struct Foo {
 
 // CHECK: indexstore_multifile.o-{{.*}}
 // CHECK: module-name: indexstoremodule
-// CHECK: main-path: SOURCE_DIR/test/SourceKit/Indexing/indexstore_multifile.swift
+// CHECK: main-path: SOURCE_DIR{{/|\\}}test{{/|\\}}SourceKit{{/|\\}}Indexing{{/|\\}}indexstore_multifile.swift
 // CHECK: out-file: BUILD_DIR{{.*}}indexstore_multifile.o
 // CHECK: is-debug: 1
 // CHECK: Unit | system | Swift | {{.*}}{{/|\\}}Swift.swiftmodule
-// CHECK: Record | user | SOURCE_DIR/test/SourceKit/Indexing/indexstore_multifile.swift | indexstore_multifile.swift-{{.*}}
+// CHECK: Record | user | SOURCE_DIR{{/|\\}}test{{/|\\}}SourceKit{{/|\\}}Indexing{{/|\\}}indexstore_multifile.swift | indexstore_multifile.swift-{{.*}}

test/SourceKit/Indexing/indexstore_with_remappings.swift

@@ -11,7 +11,7 @@ class Foo {
 
 // CHECK: indexstore_with_remappings.o-{{.*}}
 // CHECK: module-name: indexstoremodule
-// CHECK: main-path: REMAPPED_SRC_ROOT/indexstore_with_remappings.swift
-// CHECK: out-file: REMAPPED_OUT_DIR/indexstore_with_remappings.o
+// CHECK: main-path: REMAPPED_SRC_ROOT{{/|\\}}indexstore_with_remappings.swift
+// CHECK: out-file: REMAPPED_OUT_DIR{{/|\\}}indexstore_with_remappings.o
 // CHECK: is-debug: 1
 // CHECK: Unit | system | Swift | {{.*}}{{/|\\}}Swift.swiftmodule