base: add entry to .dynanmic section in genode_dyn.ld

Make sure that at least entry is present in the .dynamic section, so the
PT_DYNAMIC segment points to something valid in case there are no
dynamic symbols.

issue #3537

repos/base/src/ld/genode_dyn.ld

@@ -213,7 +213,17 @@ SECTIONS
   }
   .jcr            : { KEEP (*(.jcr)) }
   .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) }
-  .dynamic        : { *(.dynamic) } : rw : dynamic
+  .dynamic        :
+  {
+    *(.dynamic)
+
+    /*
+     * Make sure to have a least one entry within the dynamic section, so the
+     * dynamic sgement point to something valid in case there are no dynamic
+     * symbols
+     */
+    LONG(0x0);
+   } : rw : dynamic
 
   /* merge .got.plt and .got into .got, since the ARM toolchain for OKL4
    * set's * DT_PLTGOT to .got instead of .got.plt */