network/proxytunnel: Fixed underlinking with gcc-5.3.0.

Signed-off-by: David Spencer <baildon.research@googlemail.com>

network/proxytunnel/proxytunnel.SlackBuild

@@ -51,7 +51,7 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
 
-make CFLAGS+="$SLKCFLAGS"
+make CFLAGS+="$SLKCFLAGS" LDFLAGS+="-lcrypto -lssl"
 make install PREFIX=/usr MANDIR=/usr/man DESTDIR=$PKG
 
 find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \