Include files copied from libpqport in .gitignore

Michael Paquier

Author: hlinnaka

src/interfaces/libpq/.gitignore

@@ -12,8 +12,10 @@
 /snprintf.c
 /strerror.c
 /strlcpy.c
+/system.c
 /thread.c
 /win32error.c
+/win32setlocale.c
 /pgsleep.c
 /md5.c
 /ip.c