Before merging in the oss-fuzz corpora from Google, there are some changes
to the fuzzer.
- Add a read corpus script, to display corpus files nicely.
- Change the behaviour of the fuzzer so that TLV parse failures all now
go down the same execution paths, which should reduce the size of the
corpora.
- Make unknown TLVs a failure to parse, which should decrease the size
of the corpora as well.
Closes#1881
Don't make the fuzzer write out to stdout - instead write some of the
contents to a memory block so we exercise the data output code but
quietly.
Closes#1885
Automake gets confused if you want to use C++ static libraries with C
code - basically we need to involve the clang++ linker. The easiest way
of achieving this is to rename the C code as C++ code. This gets us a
bit further along the path and ought to be compatible with Google's
version of clang.
