reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

  poky: 87e3a9739d
  meta-openembedded: 6094ae18c8
  meta-security: 31dc4e7532
  meta-raspberrypi: a48743dc36
  meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
  poky:
    17726d0 systemd-systemctl-native: handle Install wildcards

  meta-openembedded:
    4321a5d libtinyxml2: update to 7.0.1
    042f0a3 libcereal: Add native and nativesdk classes
    e23284f libcereal: Allow empty package
    030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
    179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
  meta-aspeed:
    Brad Bishop (1):
          aspeed: add yocto 2.6 compatibility

  meta-ibm:
    Brad Bishop (1):
          ibm: prepare for yocto 2.6

  meta-ingrasys:
    Brad Bishop (1):
          ingrasys: set layer compatibility to yocto 2.6

  meta-openpower:
    Brad Bishop (1):
          openpower: set layer compatibility to yocto 2.6

  meta-phosphor:
    Brad Bishop (3):
          phosphor: set layer compatibility to thud
          phosphor: libgpg-error: drop patches
          phosphor: react to fitimage artifact rename

    Ed Tanous (4):
          Dropbear: upgrade options for latest upgrade
          yocto2.6: update openssl options
          busybox: remove upstream watchdog patch
          systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/poky/meta/classes/spdx.bbclass b/poky/meta/classes/spdx.bbclass
index c5f544d..fb78e27 100644
--- a/poky/meta/classes/spdx.bbclass
+++ b/poky/meta/classes/spdx.bbclass
@@ -202,18 +202,13 @@
     return
 
 def hash_file(file_name):
-    try:
-        with open(file_name, 'rb') as f:
-            data_string = f.read()
-            sha1 = hash_string(data_string)
-            return sha1
-    except:
-        return None
+    from bb.utils import sha1_file
+    return sha1_file(file_name)
 
 def hash_string(data):
     import hashlib
     sha1 = hashlib.sha1()
-    sha1.update(data)
+    sha1.update(data.encode('utf-8'))
     return sha1.hexdigest()
 
 def run_fossology(foss_command, full_spdx):
@@ -226,7 +221,7 @@
     except subprocess.CalledProcessError as e:
         return None
 
-    foss_output = string.replace(foss_output, '\r', '')
+    foss_output = foss_output.replace('\r', '')
 
     # Package info
     package_info = {}
@@ -289,7 +284,8 @@
 def get_ver_code(dirname):
     chksums = []
     for f_dir, f in list_files(dirname):
-        hash = hash_file(os.path.join(dirname, f_dir, f))
+        path = os.path.join(dirname, f_dir, f)
+        hash = hash_file(path)
         if not hash is None:
             chksums.append(hash)
         else: