Drop fully fledged version script support, only use simpler version
scripts to limit symbol visibility. Appending a version to all symbols
breaks binutils-2.17 ld(1).

Index: buildtools/wafsamba/samba_abi.py
--- buildtools/wafsamba/samba_abi.py.orig
+++ buildtools/wafsamba/samba_abi.py
@@ -169,7 +169,7 @@ def version_script_map_process_file(fname, version, ab
             continue
         if line.startswith("#"):
             continue
-        if line.endswith(" {"):
+        if line.endswith("{"):
             in_section = True
             continue
         if line == "};":
@@ -210,24 +210,7 @@ def abi_write_vscript(f, libname, current_version, ver
         version
     """
 
-    invmap = {}
-    for s in symmap:
-        invmap.setdefault(symmap[s], []).append(s)
-
-    last_key = ""
-    versions = sorted(versions, key=version_key)
-    for k in versions:
-        symver = "%s_%s" % (libname, k)
-        if symver == current_version:
-            break
-        f.write("%s {\n" % symver)
-        if k in sorted(invmap.keys()):
-            f.write("\tglobal:\n")
-            for s in invmap.get(k, []):
-                f.write("\t\t%s;\n" % s);
-        f.write("}%s;\n\n" % last_key)
-        last_key = " %s" % symver
-    f.write("%s {\n" % current_version)
+    f.write("{\n")
     local_abi = list(filter(lambda x: x[0] == '!', abi_match))
     global_abi = list(filter(lambda x: x[0] != '!', abi_match))
     f.write("\tglobal:\n")