xbps: add patch from git master to fix an assertion in xbps-create(8).

srcpkgs/xbps/patches/xbps-create-unexistent-target-symlink-assert.patch

@@ -0,0 +1,39 @@
+commit 42c21e1c3c0fbc98b56bedbc63022c5e086feb40
+Author: Juan RP <xtraeme@gmail.com>
+Date:   Thu Oct 4 09:40:52 2012 +0200
+
+    xbps-create: if a symlink points to an unexistent file store symlink target as is.
+    
+    Seen in recent builds when building the systemd binpkg:
+    
+    [chroot] => Building systemd-194_1.x86_64.xbps...
+    xbps-create.real: main.c:219: ftw_cb: Assertion `p' failed.
+    
+    Which was asserting in a symlink that was pointing to a file provided by the udev
+    pkg, therefore realpath(3) failed.
+
+diff --git a/bin/xbps-create/main.c b/bin/xbps-create/main.c
+index 2a098ca..beb79df 100644
+--- bin/xbps-create/main.c
++++ bin/xbps-create/main.c
+@@ -216,9 +216,17 @@ ftw_cb(const char *fpath, const struct stat *sb, int type, struct FTW *ftwbuf)
+                 */
+                if (strncmp(buf, "../", 3) == 0) {
+                        p = realpath(fpath, NULL);
+-                       assert(p);
+-                       xe->target = strdup(p + strlen(destdir));
+-                       free(p);
++                       if (p == NULL) {
++                               /*
++                                * This symlink points to an unexistent file,
++                                * which might be provided in another package.
++                                * So let's use the same target.
++                                */
++                               xe->target = strdup(buf);
++                       } else {
++                               xe->target = strdup(p + strlen(destdir));
++                               free(p);
++                       }
+                } else if (strchr(buf, '/') == NULL) {
+                        p = strdup(filep);
+                        assert(p);

srcpkgs/xbps/template

@@ -1,7 +1,7 @@
 # Template file for 'xbps'
 pkgname=xbps
 version=0.17
-revision=1
+revision=2
 build_style=configure
 configure_args="--prefix=/ --exec-prefix=/usr --sbindir=/usr/sbin --with-tests --with-static"
 depends="xbps-triggers"