move dring to ${prefix}/sbin

${prefix}/libexec is not part of the FHS. Moving to ${prefix}/sbin to
accomodate distros

See https://lists.debian.org/debian-devel/2005/05/msg00401.html

Change-Id: I9b2911929a2f8cc2c8f624c56b6491883c71b6a8
Tuleap: #350

bin/Makefile.am

 if HAVE_WIN32
-libexec_PROGRAMS = ringcli
+bin_PROGRAMS = ringcli
 ringcli_SOURCES = winmain.cpp
 ringcli_CXXFLAGS = -I$(top_srcdir)/src \
                    -I$(top_srcdir)/src/dring \
@@ -8,7 +8,7 @@ ringcli_LDADD = $(top_builddir)/src/libring.la
 endif
 
 if HAVE_OSX
-libexec_PROGRAMS = ringcli
+bin_PROGRAMS = ringcli
 ringcli_SOURCES = osxmain.cpp
 ringcli_CXXFLAGS = -I$(top_srcdir)/src \
                    -I$(top_srcdir)/src/dring \
@@ -19,7 +19,7 @@ endif
 if RING_DBUS
 SUBDIRS=dbus
 
-libexec_PROGRAMS = dring
+sbin_PROGRAMS = dring
 
 dring_SOURCES = main.cpp
 

bin/dbus/cx.ring.Ring.service.in

 [D-BUS Service]
 Name=cx.ring.Ring
-Exec=@LIBEXECDIR@/dring
+Exec=/usr/sbin/dring

configure.ac

@@ -366,9 +366,6 @@ AC_ARG_WITH([dbus],
 AS_IF([test "x$with_dbus" = "xyes"], [
        PKG_CHECK_MODULES(DBUSCPP, dbus-c++-1,, AC_MSG_WARN([Missing dbus development files]))
 
-       AS_AC_EXPAND(LIBEXECDIR, $libexecdir)
-       AC_SUBST(LIBEXECDIR)
-
        AC_CONFIG_FILES([bin/dbus/Makefile
                         bin/dbus/cx.ring.Ring.service])