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/0001-configure.ac-don-t-use-dnet-config.patch

@@ -0,0 +1,21 @@
+diff -urN a/configure.ac b/configure.ac
+--- a/configure.ac
++++ b/configure.ac
+@@ -949,7 +949,7 @@
+       AC_VMW_CHECK_LIB([dnet],
+                        [DNET],
+                        [],
+-                       [dnet-config],
++                       [],
+                        [],
+                        [dnet.h],
+                        [intf_open],
+@@ -959,7 +959,7 @@
+ 
+    if test $have_dnet = "no"; then
+ 		AC_MSG_ERROR(
+-		   [dnet-config was not found on your PATH. Please configure without dnet (using --without-dnet) or install dnet - http://libdnet.sourceforge.net])
++		   [dnet was not found. Please configure without dnet (using --without-dnet) or install dnet - http://libdnet.sourceforge.net])
+    fi
+ fi
+