searchpanel: ignore ELF files.

We can easily check for ELF files here, let's do this and
avoid a lot of unnecessary noise in the search panel.

src/bin/edi_searchpanel.c

@@ -300,6 +300,7 @@ edi_search_file(Eina_File *file, const char *term)
 {
    Eina_Iterator_Search *it;
    size_t length;
+   const char elf_header[4] = {0x7f, 'E', 'L', 'F'};
 
    if (!file || !term || strlen(term) == 0) return NULL;
 
@@ -319,6 +320,12 @@ edi_search_file(Eina_File *file, const char *term)
         return NULL;
      }
 
+   if (length >= 4 && !memcmp(it->map, elf_header, sizeof(elf_header)))
+     {
+        free(it);
+        return NULL;
+     }
+
    it->fp = eina_file_dup(it->fp);
    it->current.start = it->map;
    it->current.end = NULL;