sigaction: fix for THREADS_NATIVE

Commit 9c4fce55a (nptl: remove sigaction, sigprocmask, and sigfillset from
libpthread) removed pt-sigaction.c from the build to fix static build.
However, since the libc sigaction is weak when HAS_THREADS is enabled, static
build is not be affected. Tested for xtensa, x86, MIPS32 targets.

Fixes nptl/tst-signal7.

Moreover, commit 9193a76bb from the 0.9.33 branch has the right version.
Ref.: http://patchwork.ozlabs.org/patch/286084/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com>

libpthread/nptl/sysdeps/pthread/Makefile.in

@@ -33,6 +33,7 @@ libpthread_pthread_CSRC = \
 	pthread_spin_init.c \
 	pthread_spin_unlock.c \
 	pt-longjmp.c \
+	pt-sigaction.c \
 	tpp.c
 
 CFLAGS-pthread_barrier_wait.c = -D_GNU_SOURCE

libpthread/nptl/sysdeps/pthread/sigfillset.c

@@ -1,20 +0,0 @@
-/* Copyright (C) 2003, 2005 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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 <pthreadP.h>
-
-#include <../../../../libc/signal/sigfillset.c>

libpthread/nptl/sysdeps/pthread/sigprocmask.c

@@ -1,21 +0,0 @@
-/* Copyright (C) 1997,1998,1999,2000,2001,2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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 <pthreadP.h>
-#undef _LARGEFILE64_SOURCE
-
-#include <../../../../libc/sysdeps/linux/common/sigprocmask.c>