[gnome-system-monitor] Fix build with -Wl, --as-needed. Patch by Dominique Leuenberger.

[Benoît Dejean <bdejean src gnome org>]

commit 6076ce51405417ca4d7e37e6980bbf6acbea75e7
Author: Benoît Dejean <bdejean gmail com>
Date:   Tue Feb 28 18:44:41 2017 +0100

    Fix build with -Wl,--as-needed.
    Patch by Dominique Leuenberger.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779365

 src/Makefile.am |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 3ca5152..0d8c4fa 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -46,11 +46,11 @@ gnome_system_monitor_SOURCES = \
 
 # See legacy/Makefile.am for explanation
 LDADD = \
+       legacy/gsm-resources.o \
+       legacy/libgsmlegacy.la \
        $(GSM_LIBS) \
        $(SYSTEMD_LIBS) \
-       $(WNCK_LIBS) \
-       legacy/gsm-resources.o \
-       legacy/libgsmlegacy.la
+       $(WNCK_LIBS)
 
 
 # GSettings schemas, enum files and conversion file