Relocate alpha from ports to libc

Also fixed the following whitespace nits to satisfy the push:

sysdeps/alpha/alphaev6/memset.S:142: space before tab in indent.
sysdeps/alpha/configure:1: new blank line at EOF.
sysdeps/alpha/fpu/e_sqrt.c:126: space before tab in indent.
sysdeps/alpha/preconfigure:1: new blank line at EOF.
sysdeps/unix/sysv/linux/alpha/syscalls.list:1: new blank line at EOF.

sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S

@@ -0,0 +1,46 @@
+/* Copyright (C) 1993-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Mosberger <davidm@azstarnet.com>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include "kernel_sysinfo.h"
+
+
+ENTRY(__ieee_set_fp_control)
+	cfi_startproc
+	PSEUDO_PROLOGUE
+
+	lda	sp, -16(sp)
+	cfi_adjust_cfa_offset(16)
+
+	ldi	v0, __NR_osf_setsysinfo
+	stq	a0, 0(sp)
+	mov	sp, a1
+	ldi	a0, SSI_IEEE_FP_CONTROL
+	call_pal PAL_callsys
+
+	lda	sp, 16(sp)
+	cfi_adjust_cfa_offset(-16)
+
+	bne	a3, SYSCALL_ERROR_LABEL
+	ret
+
+PSEUDO_END(__ieee_set_fp_control)
+	cfi_endproc
+
+libc_hidden_def(__ieee_set_fp_control)
+weak_alias (__ieee_set_fp_control, ieee_set_fp_control)