[config] fix msvc hints
[config] fix msvc hints

esp. when being configured with a mingw perl.
remove -s from optimize, disable -O3

tested ok on win64 and win32 with cl 17 and 15

youprofit/parrot,youprofit/parrot,parrot/parrot,tkob/parrot,tkob/parrot,parrot/parrot,parrot/parrot,youprofit/parrot,youprofit/parrot,tkob/parrot,tkob/parrot,tkob/parrot,youprofit/parrot,tkob/parrot,youprofit/parrot,tkob/parrot,youprofit/parrot,youprofit/parrot,parrot/parrot,tkob/parrot,parrot/parrot