open-vm-tools: Add new package open-vm-tools

Add new package,
open-vm-tools is Open Virtual Machine Tools for VMware guest OS

tested: OpenWrt master and 18.06.2 (x86_64) on ESXi 6.5, 6.7

Signed-off-by: Yuhei OKAWA <tochiro.srchack@gmail.com>

utils/open-vm-tools/patches/0002-add-include-sys-sysmacros.h.patch

@@ -0,0 +1,13 @@
+diff -urN a/lib/wiper/wiperPosix.c b/lib/wiper/wiperPosix.c
+--- a/lib/wiper/wiperPosix.c
++++ b/lib/wiper/wiperPosix.c
+@@ -43,6 +43,9 @@
+ #  include <libgen.h>
+ # endif /* __FreeBSD_version >= 500000 */
+ #endif
++#if defined(__linux__)
++#include <sys/sysmacros.h>
++#endif
+ #include <unistd.h>
+ 
+ #include "vmware.h"