C 1.45_13: initialize init0 for fixup_ppaddr before init

add a new init0 section, and initialize it with perl_init.
Needed to set the op_ppaddr when a init function calls an already
compiled function, such as CALLREGCOMP() calling utf8::SWASHINIT
when doing a m//i.
We cannot postpone CALLREGCOMP() to init2, so we need to init the op_ppaddr
before when using -fppaddr/-O1.
t/issue330.t: new testcase for init0 with m//i utf8::SWASHINIT
t/testc.sh: add more re testcases 328-338

1. re utf8
2. re-eval