i386.c (legitimate_pic_address_disp_p): Disallow TLS SYMBOL_REFs not inside UNSPEC even in PLUS rtx.

	* config/i386/i386.c (legitimate_pic_address_disp_p): Disallow TLS
	SYMBOL_REFs not inside UNSPEC even in PLUS rtx.

	* gcc.dg/tls/opt-7.c: New test.

From-SVN: r70022