update to pcc snapshot 20160208. Rather than provide the full
list of changes, they can be found at

http://pcc.ludd.ltu.se/fisheye/changelog/pcc

Along with numerous bug fixes, the highlights might be a rewrite
of the CPP parser, updated backends for arm, pdp11, m68k, vax and
mips along with new backend for 8086. PCC now builds itself as a
2-pass compiler. There have been fixes for use with musl, C11
support added and use of UTF8 internally. PE/COFF target was fixed,
and Minix target added.