[test] Fix %hmaptool path for standalone builds

Fix %hmaptool path to refer to clang_tools_dir instead of
llvm_tools_dir, in order to fix standalone builds.  The tool is built
as part of clang, so it won't be found in installed LLVM tools.

Differential Revision: https://reviews.llvm.org/D50156

llvm-svn: 338627
diff --git a/clang/test/lit.cfg.py b/clang/test/lit.cfg.py
index ad30988..c962b41 100644
--- a/clang/test/lit.cfg.py
+++ b/clang/test/lit.cfg.py
@@ -71,7 +71,7 @@
 
 config.substitutions.append(
     ('%hmaptool', "'%s' %s" % (config.python_executable,
-                             os.path.join(config.llvm_tools_dir, 'hmaptool'))))
+                             os.path.join(config.clang_tools_dir, 'hmaptool'))))
 
 # Plugins (loadable modules)
 # TODO: This should be supplied by Makefile or autoconf.