gnu: ncftp: Build reproducibly.

* gnu/packages/patches/ncftp-reproducible.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add patch.
* gnu/packages/ftp.scm (ncftp): Add patch.

gnu/local.mk

@@ -1519,6 +1519,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/m4-gnulib-libio.patch			\
   %D%/packages/patches/nautilus-add-libportal-gtk3.patch	\
   %D%/packages/patches/ncompress-fix-softlinks.patch		\
+  %D%/packages/patches/ncftp-reproducible.patch			\
   %D%/packages/patches/netcdf-date-time.patch			\
   %D%/packages/patches/netpbm-CVE-2017-2586.patch		\
   %D%/packages/patches/netpbm-CVE-2017-2587.patch		\

gnu/packages/ftp.scm

@@ -103,6 +103,9 @@ reliability in mind.")
               (sha256
                (base32
                 "1389657cwgw5a3kljnqmhvfh4vr2gcr71dwz1mlhf22xq23hc82z"))
+              (patches
+               (search-patches
+                "ncftp-reproducible.patch"))
               (modules '((guix build utils)))
               (snippet
                '(begin

gnu/packages/patches/ncftp-reproducible.patch

@@ -0,0 +1,29 @@
+Author: Reiner Herrmann <reiner@reiner-h.de>
+Date: 2016-07-01 16:00:02 UTC
+Bug-Debian: https://bugs.debian.org/829249
+
+	make ncftp build reproducible.
+
+diff --git a/ncftp/main.c b/ncftp/main.c
+index a7fccac..b27a94e 100644
+--- a/ncftp/main.c
++++ b/ncftp/main.c
+@@ -62,7 +62,7 @@ static void
+ Usage(void)
+ {
+ 	FILE *fp;
+-#ifdef UNAME
++#if 0
+ 	char s[80];
+ #endif
+ 
+@@ -76,7 +76,7 @@ Usage(void)
+   -F     Dump a sample $HOME/.ncftp/firewall prefs file to stdout and exit.\n");
+ 
+ 	(void) fprintf(fp, "\nProgram version:  %s\nLibrary version:  %s\n", gVersion + 5, gLibNcFTPVersion + 5);
+-#ifdef UNAME
++#if 0
+ 	AbbrevStr(s, UNAME, 60, 1);
+ 	(void) fprintf(fp, "Build system:     %s\n", s);
+ #endif
+