Do not create sub_dirs. This breaks the CSS links for the website and produces really long URLS.

llvm-svn: 143487
diff --git a/clang/docs/doxygen.cfg.in b/clang/docs/doxygen.cfg.in
index 7f3292c..ed9ffcb 100644
--- a/clang/docs/doxygen.cfg.in
+++ b/clang/docs/doxygen.cfg.in
@@ -39,7 +39,7 @@
 # source files, where putting all generated files in the same directory would 
 # otherwise cause performance problems for the file system.
 
-CREATE_SUBDIRS         = YES
+CREATE_SUBDIRS         = NO
 
 # The OUTPUT_LANGUAGE tag is used to specify the language in which all 
 # documentation generated by doxygen is written. Doxygen will use this