Add additional references to related work section

[dtarditi]

Here are some additional references to add:

New paper on data-oriented programming:

https://www.comp.nus.edu.sg/~shweta24/publications/dop_oakland16.pdf

Data-Oriented Programming: On the Expressiveness of Non-Control Data Attacks
Hong Hu, Shweta Shinde, Adrian Sendroiu, Zheng Leong Chua, Prateek Saxena, and Zhenkai Liang (National University of Singapore)

Predecessors to the current address sanitizers in GCC

• GCC bounded pointers extension:
  -- https://gcc.gnu.org/ml/gcc-patches/2000-03/msg00358.html
  -- http://www.imperial.ac.uk/pls/portallive/docs/1/18619746.PDF
• Mudflap, which succeeded the bounded pointers extension:
  -- ftp://ftp.uvsq.fr/pub/gcc/summit/2003/mudflap.pdf

An earlier proposal for safe arrays/pointers

• Safe arrays and pointers for C, by John Nagle: http://www.animats.com/papers/languages/safearraysforc43.pdf

Intel MPX extension