Add LDFLAGS variable to Makefile so that extra linker flags can be sent via this variable.

Upstream-Status: Pending

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>

diff --git a/Makefile b/Makefile
index 4f7af1d..a05a000 100644
--- a/Makefile
+++ b/Makefile
@@ -83,8 +83,8 @@ endif
 
 CPPFLAGS=		$(CPPFLAGS.ippooltest)
 CFLAGS=			-I. -Iusl -Icli -MMD -Wall -g $(CPPFLAGS) $(CPPFLAGS.dmalloc)
-LDFLAGS.ippoold=	-Wl,-E -L. -Lusl -lusl -lnsl -ldl $(LIBS.dmalloc) -lc
-LDFLAGS.ippoolconfig=	-Lcli -lcli -lreadline -lcurses -lnsl $(LIBS.dmalloc) -lc
+LDFLAGS.ippoold=	$(LDFLAGS) -Wl,-E -L. -Lusl -lusl -lnsl -ldl $(LIBS.dmalloc) -lc
+LDFLAGS.ippoolconfig=	$(LDFLAGS) -Lcli -lcli -lreadline -lcurses -lnsl $(LIBS.dmalloc) -lc
 
 OPT_CFLAGS?=		-O