Fix path regex in test to match on Windows

llvm-svn: 312217
diff --git a/clang/test/CXX/modules-ts/basic/basic.link/module-declaration.cpp b/clang/test/CXX/modules-ts/basic/basic.link/module-declaration.cpp
index ee696d1..3c0ac5d 100644
--- a/clang/test/CXX/modules-ts/basic/basic.link/module-declaration.cpp
+++ b/clang/test/CXX/modules-ts/basic/basic.link/module-declaration.cpp
@@ -41,7 +41,7 @@
 EXPORT module PARTITION MODULE_NAME;
 #if TEST == 4
 // expected-error@-2 {{redefinition of module 'x'}}
-// expected-note-re@module-declaration.cpp:* {{loaded from '{{.*}}/x.pcm'}}
+// expected-note-re@module-declaration.cpp:* {{loaded from '{{.*[/\\]}}x.pcm'}}
 #elif TEST == 6
 // expected-error@-5 {{module partition must be declared 'export'}}
 #elif TEST == 7