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.

1 files changed, 15 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/kernel_sigaction.h b/sysdeps/unix/sysv/linux/alpha/kernel_sigaction.h
new file mode 100644
index 0000000000..4c35d969cf
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/kernel_sigaction.h
@@ -0,0 +1,15 @@
+/* This is the sigaction struction from the Linux 2.1.20 kernel.  */
+
+struct old_kernel_sigaction {
+	__sighandler_t k_sa_handler;
+	unsigned long sa_mask;
+	unsigned int sa_flags;
+};
+
+/* This is the sigaction structure from the Linux 2.1.68 kernel.  */
+
+struct kernel_sigaction {
+	__sighandler_t k_sa_handler;
+	unsigned int sa_flags;
+	sigset_t sa_mask;
+};