Handle platform diff of -fPIC

[HeaoYe]

Fix #196

Use cmake higher-level abstractions to handle platform differences of -fPIC

# if (NOT MSVC)
#   target_compile_options(openjph PRIVATE -fPIC)
# endif()
set_target_properties(openjph PROPERTIES POSITION_INDEPENDENT_CODE ON)

Thanks for considering this contribution!I'm looking forward to your feedback and am open to making any necessary changes.

[aous72]

Hi HeaoYe,

Thank you for submitting this PR.
Your proposed change is the correct way to have PIC code; I did not know about it.

I will include this PR in the next release.

Kind regards,
Aous.

[HeaoYe]

Thanks for the feedback!