[C++] Do not pass -fPIC when compiling with MSVC

[asfimport]

MSVC drops the flag, but it would be better to not have the warnings when building

Reporter: Wes McKinney / @wesm
Assignee: Wes McKinney / @wesm

Related issues:

• Arrow 0.3 release (blocks)

_{Note: This issue was originally created as ARROW-756. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
PR: #500

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 500
#500