Log Message:
Update xdelta3 to 3.0.11.

3.0.11:

Fixes and one major bug:

    Decoder block cache poor cache performance (source buffer was effectively \ 
half-sized)

and a number of minor and non-critical bugs:

    Number of decoder crashes discovered by American Fuzzy Lop
    Lingering XD3_TOOFARBACK issues
    Improved testing & portability

3.0.10

Primarily fixes jmacd/xdelta#188

Continuing work on portability, new release script runs build+test in more \ 
configurations.
Windows executable built with MinGW cross compiler.

3.0.9

Builds (more) cleanly on newer compilers.

Improvements in "printf" usage & portability Several minor bug \ 
fixes. Move to Github.

3.0.8

Windows build now includes support for liblzma secondary compression with \ 
"-S lzma". (Sorry for the delay.)