Do not enable -fPIC when compiling on Windows (#1280)
Do not enable -fPIC when compiling on Windows (#1280)

Regardless of the compiler, Windows targets do not support -fPIC,
as position independent code is already implicitly enabled. Compiling
simdjson with Clang on Windows will error because -fPIC is an
unsupported option for target 'x86_64-pc-windows-msvc'.
lemire/simdjson,lemire/simdjson,lemire/simdjson,lemire/simdjson,lemire/simdjson,lemire/simdjson