Add simulation-based CCoinsViewCache fuzzer

The fuzzer goes through a sequence of operations that get applied to both a
real stack of CCoinsViewCache objects, and to simulation data, comparing
the two at the end.

Author: sipa

src/Makefile.test.include

@@ -248,6 +248,7 @@ test_fuzz_fuzz_SOURCES = \
  test/fuzz/chain.cpp \
  test/fuzz/checkqueue.cpp \
  test/fuzz/coins_view.cpp \
+ test/fuzz/coinscache_sim.cpp \
  test/fuzz/connman.cpp \
  test/fuzz/crypto.cpp \
  test/fuzz/crypto_aes256.cpp \