Fix mkbundle on Mac OS X

On Mac OS X files got trailing zeros which somehow seam to work
quite nice except for the javascript parser that did not like them.
This adds a awk that filters out empty lines from od and also
fixes some of the sed substitutions that seamed broken.

Tested manually on Linux and it seams to output correct C code.

support/mkbundle

@@ -87,7 +87,7 @@ for file in $FILES; do
 
  echo >>${OUTPUT} "// ${SOURCE}/$file"
  echo >>${OUTPUT} "static const unsigned char embedded_$name[]={"
- $READER <${SOURCE}/$file | od -v -An -b | sed s/^\ */0/ | sed s/\ *$$/,/| sed s/\ /,\ 0/g|sed s/$/,/ >>${OUTPUT}
+ $READER <${SOURCE}/$file | od -v -An -b | awk '/[^\s]+/ { print $0 }' | sed s/^\ */0/ | sed s/\ *$/,/| sed s/\ /,\ 0/g >>${OUTPUT}
  echo >>${OUTPUT} "};"
  fi
 done
@@ -138,4 +138,4 @@ static void __attribute__((constructor)) filebundle_init (void)
  cnt++;
 }
 
-EOF
+EOF