Merge commit 'f951837c'

* commit 'f951837c':
  configure: Don't add -fPIC to cflags for target_os=win32
Merged-by: James Almer <jamrial@gmail.com>

configure

@@ -5322,7 +5322,7 @@ enable_weak_pic() {
     enable pic
     add_cppflags -DPIC
     case "$target_os" in
-    mingw*|cygwin*)
+    mingw*|cygwin*|win*)
         ;;
     *)
         add_cflags -fPIC