Remove has_DT_SYMBOLIC flag

From the elf-spec: "Symbolically bound shared objects are
  identified by the .dynamic entry DT_SYMBOLIC. This tag is
  informational only; the runtime linker processes symbol
  lookups from these objects in the same manner as any
  other object."

Change-Id: I4aae0e502ed9fac096fbf076f4d6b2e055d784f6

linker/dlfcn.cpp

@@ -244,7 +244,6 @@ soinfo* get_libdl_info() {
     __libdl_info.nchain = sizeof(g_libdl_chains)/sizeof(unsigned);
     __libdl_info.bucket = g_libdl_buckets;
     __libdl_info.chain = g_libdl_chains;
-    __libdl_info.has_DT_SYMBOLIC = true;
     __libdl_info.ref_count = 1;
   }