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/Versions

@@ -0,0 +1,102 @@
+libc {
+  # The comment lines with "#errlist-compat" are magic; see
+  # sysdeps/gnu/errlist-compat.awk.
+  # When you get an error from errlist-compat.awk, you need to add a new
+  # version here.  Don't do this blindly, since this means changing the ABI
+  # for all GNU/Linux configurations.
+
+  GLIBC_2.0 {
+    #errlist-compat	131
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+
+    # Unfortunately in wider use.
+    _inb; _inw; _inl; _outb; _outw; _outl; _bus_base; _bus_base_sparse;
+    _hae_shift;
+
+    # Exception handling support functions from libgcc
+    __register_frame; __register_frame_table; __deregister_frame;
+    __frame_state_for; __register_frame_info_table;
+
+    # b*
+    bus_base; bus_base_sparse;
+
+    # h*
+    hae_shift;
+
+    # i*
+    inb; inl; inw; ioperm; iopl;
+
+    # o*
+    outb; outl; outw;
+
+    # p*
+    pciconfig_read; pciconfig_write; sethae;
+  }
+  GLIBC_2.1 {
+    #errlist-compat	131
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+
+    # Linux/Alpha 64-bit timeval functions.
+    __select; select;
+    adjtime; adjtimex; __adjtimex;
+    __gettimeofday;
+
+    # glob interface change
+    glob; globfree;
+
+    # limit type change
+    getrusage;
+
+    # time type change
+    gettimeofday; getitimer;
+
+    # i*
+    ieee_get_fp_control; ieee_set_fp_control;
+
+    # s*
+    setitimer; settimeofday;
+
+    # u*
+    utimes;
+
+    # w*
+    wait4;
+  }
+  GLIBC_2.1.4 {
+    pciconfig_iobase;
+  }
+  GLIBC_2.2.2 {
+    # w*
+    wordexp;
+  }
+  GLIBC_2.3 {
+    #errlist-compat	132
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+  }
+  GLIBC_2.4 {
+    #errlist-compat	138
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+  }
+  GLIBC_2.12 {
+    #errlist-compat	139
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+  }
+  GLIBC_2.16 {
+    #errlist-compat	140
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+  }
+  GLIBC_PRIVATE {
+    __libc_alpha_cache_shape;
+  }
+}
+ld {
+  GLIBC_PRIVATE {
+    __libc_alpha_cache_shape;
+  }
+}
+librt {
+  GLIBC_2.3 {
+    # AIO functions.
+    aio_cancel; aio_cancel64;
+  }
+}