Update dependencies.

I added the regex-syntax crate to the dependencies for hashsum, nl, and
ptx.

src/hashsum/deps.mk

@@ -1 +1 @@
-DEPLIBS += regex crypto rand rustc-serialize time
+DEPLIBS += regex regex-syntax crypto rand rustc-serialize time

src/hashsum/hashsum.rs

@@ -13,6 +13,7 @@
 
 extern crate crypto;
 extern crate getopts;
+extern crate regex_syntax;
 extern crate regex;
 
 use crypto::digest::Digest;

src/nl/deps.mk

@@ -1 +1 @@
-DEPLIBS += regex
+DEPLIBS += regex regex-syntax

src/nl/nl.rs

@@ -12,6 +12,7 @@
  */
 
 extern crate getopts;
+extern crate regex_syntax;
 extern crate regex;
 
 use std::fs::File;

src/ptx/deps.mk

@@ -1 +1 @@
-DEPLIBS += regex
+DEPLIBS += regex regex-syntax

src/ptx/ptx.rs

@@ -10,6 +10,7 @@
  * file that was distributed with this source code.
  */
 extern crate getopts;
+extern crate regex_syntax;
 extern crate regex;
  
 use std::collections::{HashMap, HashSet, BTreeSet};