selftest/eSDK.py: fix sstate dir not found error

The following changes since commit dbb247cac5fbf7b037e4955f9793828451723924:

bitbake: cookerdata: Convert multiconfig to use BB_CURRENT_MC (2016-12-22 12:36:40 +0000)

are available in the git repository at:

git://git.pokylinux.org/poky-contrib ChenQi/eSDK-sstate_dir
http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=ChenQi/eSDK-sstate_dir

Chen Qi (1):
selftest/eSDK.py: fix sstate dir not found error

 meta/lib/oeqa/selftest/eSDK.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

1.9.1

Fix the error below when SSTATE_DIR is not "${BUILDDIR}/sstate-cache".

FileNotFoundError: [Errno 2] No such file or directory: '/xxx/../sstate-cache'

---
 meta/lib/oeqa/selftest/eSDK.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 9d5c680..b43a452 100644
@@ -55,7 +55,7 @@ class oeSDKExtSelfTest(oeSelfTest):
     @classmethod
     def setUpClass(cls):
         # Start to serve sstate dir
-        sstate_dir = os.path.join(os.environ['BUILDDIR'], 'sstate-cache')
+        sstate_dir = get_bb_var('SSTATE_DIR')
         cls.http_service = HTTPService(sstate_dir)
         cls.http_service.start()
 

1.9.1