Included assert.h so that the code compiles under newer versions of GCC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6682 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/DependenceGraph.h

@@ -23,6 +23,8 @@
 #include <vector>
 #include <utility>
 
+#include <assert.h>
+
 class Instruction;
 class Function;
 class Dependence;