Implemented -A flag for Windows (#665)

TODO:  Need to update some documentation that reflects `-A` is applicable to Windows.  @bmah888 to do this.
diff --git a/configure b/configure
index 045006c..4f5d1f2 100755
--- a/configure
+++ b/configure
@@ -13002,7 +13002,7 @@
 # FreeBSD uses cpuset_setaffinity while Linux uses sched_setaffinity.
 # Define HAVE_CPU_AFFINITY to indicate the CPU affinity setting as a
 # generic concept is available.
-for ac_func in cpuset_setaffinity sched_setaffinity
+for ac_func in cpuset_setaffinity sched_setaffinity SetProcessAffinityMask
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"