Fix a bug in the dep analysis script.

It wasn't always normalizing slashes correctly, so you'd end
up with the same thing in the map twice.

llvm-svn: 296947

Author: Zachary Turner

lldb/scripts/analyze-project-deps.py

@@ -35,6 +35,7 @@ def insert_or_add_mapping(base, deps):
     relative = os.path.relpath(base, inc_dir)
     inc_files = filter(lambda x : os.path.splitext(x)[1] in [".h"], files)
     deps = set()
+    relative = relative.replace("\\", "/")
     for inc in inc_files:
         inc_path = os.path.join(base, inc)
         deps.update(scan_deps(relative, inc_path))