-Wl, --enable-new-dtags for DT_RUNPATH instead of DT_RPATH

Today by accident i had to deal with linker problems of some
software and found an issue that mentioned DT_RUNPATH, which
mentioned that DT_RPATH is legacy and searched for
$LD_LIBRARY_PATH, whereas the newer DT_RUNPATH is searched
thereafter.  Completely unencrypted!  Well.  For what's it worth,
i for one am astonished because of course i want to override
$LD_LIBRARY_PATH, but it surely has its merites, smart people came
to the conclusion, did they.

The attached diff below seems to be sufficient to support
DT_RUNPATH instead of DT_RPATH with tcc(1).  But i have no insight
in what --enable-new-dtags is supposed to change in addition, so
i wonder.

Ciao!

--steffen

 libtcc.c     | 2 ++
 tcc-doc.texi | 4 ++++
 tcc.h        | 1 +
 tccelf.c     | 3 ++-
 4 files changed, 9 insertions(+), 1 deletion(-)

libtcc.c

@@ -1377,6 +1377,8 @@ static int tcc_set_linker(TCCState *s, const char *option)
             ignoring = 1;
         } else if (link_option(option, "rpath=", &p)) {
             copy_linker_arg(&s->rpath, p, ':');
+        } else if (link_option(option, "enable-new-dtags", &p)) {
+            s->enable_new_dtags = 1;
         } else if (link_option(option, "section-alignment=", &p)) {
             s->section_align = strtoul(p, &end, 16);
         } else if (link_option(option, "soname=", &p)) {