Amend path to compiler-rt sources

Author: edymtt

utils/swift_build_support/swift_build_support/products/tsan_libdispatch.py

@@ -48,7 +48,9 @@ def should_build(self, host_target):
 
     def build(self, host_target):
         """Build TSan runtime (compiler-rt)."""
-        rt_source_dir = join_path(self.source_dir, os.pardir, 'compiler-rt')
+        rt_source_dir = join_path(
+            self.source_dir, os.pardir,
+            'llvm-project', 'compiler-rt')
         toolchain_path = join_path(self.args.install_destdir, 'usr')
         clang = join_path(toolchain_path, 'bin', 'clang')
         clangxx = join_path(toolchain_path, 'bin', 'clang++')