[PATCH v3 1/7] isar-bootstrap: Update routine to determine host arch

[Alexander Smirnov <asmirnov@ilbers.de>]

Use generic dpkg call, because dpkg-architecture requires additional
package to install.

Signed-off-by: Alexander Smirnov <asmirnov@ilbers.de>
---
 meta/classes/isar-bootstrap-helper.bbclass | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/meta/classes/isar-bootstrap-helper.bbclass b/meta/classes/isar-bootstrap-helper.bbclass
index e4d99d5..3faee7c 100644
--- a/meta/classes/isar-bootstrap-helper.bbclass
+++ b/meta/classes/isar-bootstrap-helper.bbclass
@@ -9,8 +9,12 @@ IMAGE_TRANSIENT_PACKAGES ??= ""
 
 def get_deb_host_arch():
     import subprocess
-    arch =  subprocess.check_output(['/usr/bin/dpkg-architecture', '-q', 'DEB_HOST_ARCH'], universal_newlines=True)
-    return str.splitlines(arch)[0]
+    host_arch = subprocess.Popen("dpkg --print-architecture",
+                                 shell=True,
+                                 env=os.environ,
+                                 stdout=subprocess.PIPE
+                                ).stdout.read().decode('utf-8').strip()
+    return host_arch
 
 #Debian Distribution for SDK host
 HOST_DISTRO ?= "debian-stretch"
-- 
2.1.4