Adds liblockfile (and patch to avoid need for root) (#7621)

* --enable-shared *additionally* builds shared libraries
  (and it builds fast, so no variant here)

var/spack/repos/builtin/packages/liblockfile/install_as_nonroot.patch

@@ -0,0 +1,46 @@
+--- liblockfile-1.14/Makefile.in	2017-01-17 13:21:05.000000000 +0000
++++ liblockfile-1.14/Makefile.in	2018-03-28 07:20:45.054312625 +0000
+@@ -49,35 +49,33 @@ xlockfile.o:	lockfile.c
+ 		$(CC) $(CFLAGS) -c lockfile.c -o xlockfile.o
+ 
+ install_static:	static install_common
+-		install -d -m 755 -g root -p $(libdir)
++		install -d -m 755 -p $(libdir)
+ 		install -m 644 liblockfile.a $(libdir)
+ 
+ install_shared:	shared install_static install_common
+-		install -d -m 755 -g root -p $(libdir)
++		install -d -m 755 -p $(libdir)
+ 		install -m 755 liblockfile.so \
+ 			$(libdir)/liblockfile.so.$(SOVER)
+ 		ln -s liblockfile.so.$(SOVER) $(libdir)/liblockfile.so.$(MAJOR)
+ 		ln -s liblockfile.so.$(SOVER) $(libdir)/liblockfile.so
+-		if test "$(DESTDIR)" = ""; then @LDCONFIG@; fi
+ 
+ install_common:
+-		install -d -m 755 -g root -p $(includedir)
+-		install -d -m 755 -g root -p $(bindir)
+-		install -d -m 755 -g root -p $(mandir)/man1
+-		install -d -m 755 -g root -p $(mandir)/man3
++		install -d -m 755 -p $(includedir)
++		install -d -m 755 -p $(bindir)
++		install -d -m 755 -p $(mandir)/man1
++		install -d -m 755 -p $(mandir)/man3
+ 		install -m 644 lockfile.h maillock.h $(includedir)
+ 		if [ "$(MAILGROUP)" != "" ]; then\
+ 		  install -g $(MAILGROUP) -m 2755 dotlockfile $(bindir);\
+ 		else \
+-		  install -g root -m 755 dotlockfile $(bindir); \
++		  install -m 755 dotlockfile $(bindir); \
+ 		fi
+ 		install -m 644 *.1 $(mandir)/man1
+ 		install -m 644 *.3 $(mandir)/man3
+ 
+ install_nfslib:	nfslib
+-		install -d -m 755 -g root -p $(nfslockdir)
++		install -d -m 755 -p $(nfslockdir)
+ 		install -m 755 nfslock.so.$(NFSVER) $(nfslockdir)
+-		if test "$(DESTDIR)" = ""; then @LDCONFIG@; fi
+ 
+ clean:
+ 		rm -f *.a *.o *.so *.so.* dotlockfile

var/spack/repos/builtin/packages/liblockfile/package.py

@@ -0,0 +1,40 @@
+##############################################################################
+# Copyright (c) 2013-2017, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/spack/spack
+# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
+#
+# This program 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) version 2.1, February 1999.
+#
+# This program 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 terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+
+
+class Liblockfile(AutotoolsPackage):
+    """NFS-safe locking library"""
+
+    homepage = "https://github.com/miquels/liblockfile"
+    url      = "https://github.com/miquels/liblockfile/archive/v1.14.tar.gz"
+
+    version('1.14', '24ce9dbb34d7f508a52a91f762746ce3')
+
+    patch('install_as_nonroot.patch')
+
+    def configure_args(self):
+        args = ['--enable-shared']
+        return args