buildimage: Allow use of rsvg-convert as alternative to rsvg.

configure

@@ -5771,7 +5771,7 @@ fi
 done
 test -n "$FONTFORGE" || FONTFORGE="false"
 
-  for ac_prog in rsvg
+  for ac_prog in rsvg-convert rsvg
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2

configure.ac

@@ -284,7 +284,7 @@ then
 else
   test "$srcdir" = . || AC_MSG_ERROR([Maintainer mode cannot work out of tree.])
   AC_CHECK_PROGS(FONTFORGE, fontforge, false)
-  AC_CHECK_PROGS(RSVG, rsvg, false)
+  AC_CHECK_PROGS(RSVG, rsvg-convert rsvg, false)
   AC_CHECK_PROGS(CONVERT, convert, false)
   AC_CHECK_PROGS(ICOTOOL, icotool, false)
   test "$FONTFORGE" != "false" || AC_MSG_ERROR([You need fontforge to rebuild fonts in maintainer mode.])

tools/buildimage

@@ -141,7 +141,12 @@ sub svg_element_start
 }
 
 # Render the SVG image
-shell $rsvg, $svgFileName, $renderedSVGFileName;
+my @rsvgCmd;
+push(@rsvgCmd, $rsvg);
+push(@rsvgCmd, $svgFileName);
+push(@rsvgCmd, "-o") if ($rsvg eq "rsvg-convert");
+push(@rsvgCmd, $renderedSVGFileName);
+shell @rsvgCmd;
 
 # Render the images in the SVG
 my $parser = new XML::Parser(