This fixes compilation with slibtool instead of GNU libtool

--- filezilla-3.52.2/src/engine/Makefile.am
+++ filezilla-3.52.2/src/engine/Makefile.am
@@ -146,6 +146,8 @@
 libfzclient_private_la_LDFLAGS += $(LIBFILEZILLA_LIBS)
 libfzclient_private_la_LDFLAGS += $(IDN_LIB)
 
+libfzclient_private_la_LIBADD = $(PUGIXML_LIBS)
+
 dist_noinst_DATA = engine.vcxproj
 
 CLEANFILES = filezilla.h.gch
--- filezilla-3.52.2/src/interface/Makefile.am
+++ filezilla-3.52.2/src/interface/Makefile.am
@@ -309,7 +309,7 @@
 
 if HAVE_DBUS
 filezilla_DEPENDENCIES += ../dbus/libfzdbus.a
-filezilla_LDFLAGS += ../dbus/libfzdbus.a $(LIBDBUS_LIBS)
+filezilla_LDADD = ../dbus/libfzdbus.a $(LIBDBUS_LIBS)
 endif
 
 filezilla_LDFLAGS += $(WX_LIBS)