Update the test using the header file from a same test directory.

Author: MaggieYingYi

clang/test/Driver/ignored-pch.cpp

@@ -2,16 +2,16 @@
 // RUN: mkdir -p %t
 
 // Create PCH without -ignore-pch.
-// RUN: %clang -x c++-header %S/../Modules/Inputs/codegen-flags/foo.h -### 2>&1 | FileCheck %s -check-prefix=CHECK-EMIT-PCH
-// RUN: %clang -x c++-header %S/../Modules/Inputs/codegen-flags/foo.h -o %t/foo.h.pch
-// RUN: %clang %s -include-pch %t/foo.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-INCLUDE-PCH
-// RUN: %clang %s -emit-ast -include-pch %t/foo.h.pch -### 2>&1 | FileCheck %s -check-prefixes=CHECK-EMIT-PCH,CHECK-INCLUDE-PCH
+// RUN: %clang -x c++-header %S/Inputs/pchfile.h -### 2>&1 | FileCheck %s -check-prefix=CHECK-EMIT-PCH
+// RUN: %clang -x c++-header %S/Inputs/pchfile.h -o %t/pchfile.h.pch
+// RUN: %clang %s -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-INCLUDE-PCH
+// RUN: %clang %s -emit-ast -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefixes=CHECK-EMIT-PCH,CHECK-INCLUDE-PCH
 
 
 // Create PCH with -ignore-pch.
-// RUN: %clang -x c++-header -ignore-pch %S/../Modules/Inputs/codegen-flags/foo.h -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
-// RUN: %clang %s -ignore-pch -include-pch  %t/foo.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
-// RUN: %clang %s -ignore-pch -emit-ast -include-pch %t/foo.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
+// RUN: %clang -x c++-header -ignore-pch %S/Inputs/pchfile.h -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
+// RUN: %clang %s -ignore-pch -include-pch  %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
+// RUN: %clang %s -ignore-pch -emit-ast -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
 
 // CHECK-EMIT-PCH: -emit-pch
 // CHECK-INCLUDE-PCH: -include-pch