solaris: ensure that TCP_NODELAY gets picked up

Use proper libs when linking, then we can also remove
those from the Makefile.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/Makefile b/Makefile
index bb345ed..d55626d 100644
--- a/Makefile
+++ b/Makefile
@@ -92,7 +92,7 @@
   LDFLAGS += -rdynamic
 endif
 ifeq ($(UNAME), SunOS)
-  LIBS	 += -lpthread -ldl -laio -lrt -lnsl -lsocket
+  LIBS	 += -lpthread -ldl
   CPPFLAGS += -D__EXTENSIONS__
 endif
 ifeq ($(UNAME), FreeBSD)