build: select C99/C11 C standard version

Select C99 on Linux, FreeBSD and Windows Mingw.

Select C11 on Windows with Microsoft (R) C/C++ Optimizing Compiler Version.
C99 standard option is not supported with this compiler.
- disable C5105 warning in msr.c and ipsec_perf.c that appears with C11 and
  including standard headers