Add filex excluded by the gitignore.

vendor/MaxmindDB/.gitignore

@@ -0,0 +1,46 @@
+*.la
+*.lo
+*.o
+*.so
+*.swp
+*/.deps
+*/.libs
+*~
+.\#*
+.gh-pages
+/INSTALL
+/autom4te.cache
+/bin/country_lookup
+/bin/mmdbdump
+/bin/mmdblookup
+/compile
+/config.*
+/configure
+/depcomp
+/include/maxminddb_config.h
+/install-sh
+/libmaxminddb-*
+/libtool
+/ltmain.sh
+/man
+/missing
+/src/libmaxminddb.pc
+/src/libmaxminddb.a
+/src/test-data-pool
+/t/*.log
+/t/*.trs
+/t/*_t
+/t/*-t
+/t/libtap.a
+/test-driver
+\#*\#
+aclocal.m4
+stamp-h*
+CMakeCache.txt
+CMakeFiles/
+CTestTestfile.cmake
+cmake_install.cmake
+Makefile
+Makefile.in
+Testing/
+install_manifest.txt