bubblewrap: add patch from alpine

srcpkgs/bubblewrap/patches/realpath-workaround.patch

@@ -0,0 +1,19 @@
+Musl realpath() implementation currently depends on /proc which is
+not available when setting up pivot root. For the time being just
+fallback to given path if realpath() fails. If there was symlinks
+that would have required normalizing the following parse_mountinfo()
+will fail.
+
+diff --git bind-mount.c bind-mount.c
+index 7d3543f..c33b701 100644
+--- bind-mount.c
++++ bind-mount.c
+@@ -397,7 +397,7 @@ bind_mount (int           proc_fd,
+      path, so to find it in the mount table we need to do that too. */
+   resolved_dest = realpath (dest, NULL);
+   if (resolved_dest == NULL)
+-    return 2;
++    resolved_dest = strdup (dest);
+
+   mount_tab = parse_mountinfo (proc_fd, resolved_dest);
+   if (mount_tab[0].mountpoint == NULL)

srcpkgs/bubblewrap/template

@@ -1,7 +1,7 @@
 # Template file for 'bubblewrap'
 pkgname=bubblewrap
 version=0.1.8
-revision=1
+revision=2
 build_style=gnu-configure
 hostmakedepends="automake pkg-config"
 makedepends="libcap-devel"