Restore accidentally deleted file (I blame svn).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129588 91177308-0d34-0410-b5e6-96231b3b80d8

runtime/Makefile

+##===- runtime/Makefile ------------------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+CLANG_LEVEL := ..
+include $(CLANG_LEVEL)/../../Makefile.config
+
+ifndef NO_RUNTIME_LIBS
+
+PARALLEL_DIRS  := compiler-rt
+
+endif
+
+include $(CLANG_LEVEL)/Makefile
+
+install::
+