fio: update to 3.19

Added compilation fixes.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/fio/patches/020-vasprintf.patch

@@ -0,0 +1,12 @@
+--- a/configure
++++ b/configure
+@@ -892,7 +892,8 @@ cat > $TMPC << EOF
+ 
+ int main(int argc, char **argv)
+ {
+-  return vasprintf(NULL, "%s", NULL) == 0;
++  va_list ap;
++  return vasprintf(NULL, "%s", ap) == 0;
+ }
+ EOF
+ if compile_prog "" "" "have_vasprintf"; then