lrzsz: fix repeated target install

Closes #4165

Use ln -sf in case destination already exists from an earlier install,
and use install -D rather than cp while we're at it.

Based on patch by Hector Oron <hector.oron@gmail.com>

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
diff --git a/CHANGES b/CHANGES
index 6dc8789..6345210 100644
--- a/CHANGES
+++ b/CHANGES
@@ -60,6 +60,7 @@
 	#3631: Error while compiling with Xorg
 	#3925: midori not getting compile
 	#4045: Add support for downloading i386 toolchains from codesourcery
+	#4165: lrzsz-fix-symlink-at-rebuild.patch
 	#4171: makedevs-unused-but-set-variable.patch
 	#4183: Codesourcery toolchain download site has changed