gnuplot: upgrade to 4.6.5

* automake patch from 4.4.4 is no longer needed
* PACKAGECONFIG for lua (lua term is only useful for LaTeX)
* linking problems with dlopen, etc. in lua loadlibs.c fixed
  ** this same problem was seen in jansa world builds for 4.4.4
  ** I am not able to replicate that error on 4.4.4

NOTE: qt is supported by this version, but I was not able to
figure out the configuration...

Signed-off-by: Tim Orling <TicoTimo@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-extended/gnuplot/gnuplot.inc

@@ -12,6 +12,7 @@ acpaths = ""
 
 PACKAGECONFIG ??= "cairo"
 PACKAGECONFIG[cairo] = "--with-cairo,--without-cairo,cairo pango"
+PACKAGECONFIG[lua] = "--with-lua,--without-lua,lua"
 
 EXTRA_OECONF = "--with-readline=${STAGING_LIBDIR}/.. \
                 --without-lisp-files \