jh_linkjars: Replace existing files with symlinks

Signed-off-by: Niels Thykier <niels@thykier.net>

debian/changelog

@@ -2,6 +2,8 @@ javatools (0.68) UNRELEASED; urgency=medium
 
   * jh_installjavadoc: Add missing install_dir call to fix FTBFS
     when the target dir does not already exist.  (Closes: #909907)
+  * jh_linkjars: Replace target files with a symlink rather than
+    failing because it exists.  (Closes: #909954)
 
  -- Niels Thykier <niels@thykier.net>  Fri, 28 Sep 2018 18:03:19 +0000
 

jh_linkjars

@@ -166,6 +166,7 @@ if ($UNLINK_JARS) {
         for my $jar (@JARS) {
             my $basename = basename($jar);
             verbose_print("Adding link for $jar to ${target_dir}");
+            rm_files("${target_dir}/${basename}");
             make_symlink_raw_target($jar, "${target_dir}/${basename}");
         }
     }