* tlssup.c (__dyn_tls_init): Use an integer variable to iterate between __xd_a and __xd_z.
Implement TLS Callback. * tlsmcrt.c: New file. * tlsmthread.c: Ditto. * tlssup.c: Ditto. * tlsthrd.c: Ditto. * Makefile.in: Include new files. * crt1.c: Implement TLS Callback. * dllcrt1.c: Ditto. * mthr_stub.c: Remove.