restic: ignore chmod() failure

Fixes problem with creating repositories in /sdcard/.
Issue https://github.com/termux/termux-packages/issues/4728.

packages/restic/build.sh

@@ -3,6 +3,7 @@ TERMUX_PKG_DESCRIPTION="Fast, secure, efficient backup program"
 TERMUX_PKG_LICENSE="BSD"
 TERMUX_PKG_MAINTAINER="Leonid Plyushch <leonid.plyushch@gmail.com>"
 TERMUX_PKG_VERSION=0.9.6
+TERMUX_PKG_REVISION=1
 # Use a snapshot to fix building with go 1.13:
 #TERMUX_PKG_SRCURL=https://github.com/restic/restic/archive/v$TERMUX_PKG_VERSION.tar.gz
 TERMUX_PKG_SRCURL=https://github.com/restic/restic/archive/604b18aa7426148a55f76307ca729e829ff6b61d.zip

packages/restic/failsafe-chmod.patch

@@ -0,0 +1,18 @@
+diff -uNr restic/internal/fs/file_unix.go restic.mod/internal/fs/file_unix.go
+--- restic/internal/fs/file_unix.go	2019-07-29 10:22:22.000000000 +0300
++++ restic.mod/internal/fs/file_unix.go	2020-01-01 17:54:08.797875856 +0200
+@@ -47,12 +47,6 @@
+ 
+ // Chmod changes the mode of the named file to mode.
+ func Chmod(name string, mode os.FileMode) error {
+-	err := os.Chmod(fixpath(name), mode)
+-
+-	// ignore the error if the FS does not support setting this mode (e.g. CIFS with gvfs on Linux)
+-	if err != nil && isNotSupported(err) {
+-		return nil
+-	}
+-
+-	return err
++	os.Chmod(fixpath(name), mode)
++	return nil
+ }