autossh: honour LDFLAGS

Fixes:
 http://autobuild.buildroot.net/results/08a458572a2e9c599dd32b837b1e5c02a6721973

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/autossh/0001-honour-LDFLAGS.patch

@@ -0,0 +1,16 @@
+Honour LDFLAGS, especially required when static linking
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur autossh-1.4e.orig/Makefile.in autossh-1.4e/Makefile.in
+--- autossh-1.4e.orig/Makefile.in	2015-02-10 05:41:58.000000000 +0100
++++ autossh-1.4e/Makefile.in	2016-11-25 12:49:06.052122855 +0100
+@@ -31,7 +31,7 @@
+ 
+ 
+ $(TARGET):	$(OFILES)
+-		$(CC) $(CPPFLAGS) -o $(TARGET) $(OFILES) $(LIBS)
++		$(CC) $(CPPFLAGS) $(LDFLAGS) -o $(TARGET) $(OFILES) $(LIBS)
+ 
+ clean:
+ 		- /bin/rm -f *.o *.a *.core *~