dropbear: fix static build

the -lcrypt is missing during the link

svr-authpasswd.o: In function `svr_auth_password':
svr-authpasswd.c:(.text+0xfc): undefined reference to `crypt'
collect2: ld returned 1 exit status

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 Makefile.in |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: b/Makefile.in
===================================================================
--- a/Makefile.in
+++ b/Makefile.in
@@ -99,7 +99,7 @@ STRIP=@STRIP@
 INSTALL=@INSTALL@
 CPPFLAGS=@CPPFLAGS@
 CFLAGS+=-I. -I$(srcdir) $(CPPFLAGS) @CFLAGS@
-LIBS+=@LIBS@
+LIBS+=@CRYPTLIB@ @LIBS@
 LDFLAGS=@LDFLAGS@
 
 EXEEXT=@EXEEXT@