[gnome-continuous-yocto/gnomeostree-3.28-rocko: 3014/8267] package_tar: avoid chdir warnings and restore cwd after packaging

[Emmanuele Bassi <ebassi src gnome org>]

commit 49d189e2415137d2091d72c3c7fd0dd45f53d908
Author: Robert Yang <liezhi yang windriver com>
Date:   Wed Oct 12 02:19:05 2016 -0700

    package_tar: avoid chdir warnings and restore cwd after packaging
    
    Fixed:
    WARNING: attr-2.4.47-r0 do_package_write_tar: Task do_package_tar changed cwd to 
/path/to/attr/2.4.47-r0/packages-split/attr-locale-sv
    
    (From OE-Core rev: 3753d07c9ff33b9a97aca61ad312b0e283c4c68d)
    
    Signed-off-by: Robert Yang <liezhi yang windriver com>
    Signed-off-by: Ross Burton <ross burton intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/package_tar.bbclass |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/meta/classes/package_tar.bbclass b/meta/classes/package_tar.bbclass
index 854e645..e217814 100644
--- a/meta/classes/package_tar.bbclass
+++ b/meta/classes/package_tar.bbclass
@@ -4,6 +4,9 @@ IMAGE_PKGTYPE ?= "tar"
 
 python do_package_tar () {
     import subprocess
+
+    oldcwd = os.getcwd()
+
     workdir = d.getVar('WORKDIR', True)
     if not workdir:
         bb.error("WORKDIR not defined, unable to package")
@@ -49,6 +52,8 @@ python do_package_tar () {
         ret = subprocess.call(args + [tarfn] + dlist)
         if ret != 0:
             bb.error("Creation of tar %s failed." % tarfn)
+
+    os.chdir(oldcwd)
 }
 
 python () {