Repro for absolute pcm paths in deps file.

[klimek]

Summary

This test breaks. A guide towards a fix would be appreciated :)

test/Modules/Inputs/relative-module-paths/a.h

+#ifndef A_H
+#define A_H
+
+void a() {
+}
+
+#endif

test/Modules/Inputs/relative-module-paths/b.h

+#ifndef B_H
+#define B_H
+
+#include "a.h"
+
+void b() {
+  a();
+}
+
+#endif

test/Modules/Inputs/relative-module-paths/module.map

+module "a" {
+  export *
+  header "Inputs/relative-module-paths/a.h"
+}
+
+module "b" {
+  export *
+  header "Inputs/relative-module-paths/b.h"
+  use "a"
+}
+
+

test/Modules/relative-module-paths.cpp

+// RQUIRES: shell
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: cd %t
+// RUN: ln -s %S/Inputs Inputs
+
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodule-name=a -o a.pcm \
+// RUN:     -fno-implicit-modules -fmodule-map-file-home-is-cwd \
+// RUN:     -emit-module Inputs/relative-module-paths/module.map
+
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodule-name=b -o b.pcm \
+// RUN:     -fmodule-file=a.pcm \
+// RUN:     -fno-implicit-modules -fmodule-map-file-home-is-cwd \
+// RUN:     -emit-module Inputs/relative-module-paths/module.map
+
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules %s \
+// RUN:     -fmodule-map-file=Inputs/relative-module-paths/module.map \
+// RUN:     -fmodule-file=b.pcm \
+// RUN:     -fno-implicit-modules -fmodule-map-file-home-is-cwd \
+// RUN:     -module-file-deps -MT %s.o -dependency-file deps
+
+// RUN: cat deps
+// RUN: FileCheck %s < %t/deps
+
+#include "Inputs/relative-module-paths/a.h"
+
+void f() {
+  a();
+}
+
+// CHECK: Hah
+
+
+