Ugly workaround for RPM 4.14 vs 4.15 python3 bindings incompatibility

Upstream commits:
    a310a79f81f2b2dd3a31a101562e67915476a751
    8fd904b53c028dded0b308ee95f1a5ff998584fd

diff --git a/rpmlint/Pkg.py b/rpmlint/Pkg.py
index 8d01f30..1b25771 100644
--- rpmlint-rpmlint-1.11.orig/Pkg.py
+++ rpmlint-rpmlint-1.11/Pkg.py
@@ -143,8 +143,17 @@ def is_utf8(fname):
 
 
 def is_utf8_bytestr(s):
+    """Returns True whether the given text is UTF-8.
+    Due to changes in rpm, needs to handle both bytes and unicode."""
     try:
-        s.decode('UTF-8')
+        if hasattr(s, 'decode'):
+            s.decode('utf-8')
+        elif hasattr(s, 'encode'):
+            s.encode('utf-8')
+        else:
+            unexpected = type(s).__name__
+            raise TypeError(
+                'Expected str/unicode/bytes, not {}'.format(unexpected))
     except UnicodeError:
         return False
     return True
--- rpmlint-rpmlint-1.11.orig/PostCheck.py
+++ rpmlint-rpmlint-1.11/PostCheck.py
@@ -70,6 +70,8 @@ def incorrect_perl_script(prog, perlscri
 def check_syntax_script(prog, commandline, script):
     if not script:
         return False
+    if isinstance(script, str):
+        script = script.encode('utf-8')
     # TODO: test that "prog" is available/executable
     tmpfd, tmpname = tempfile.mkstemp(prefix='rpmlint.')
     tmpfile = os.fdopen(tmpfd, 'wb')
--- rpmlint-rpmlint-1.11.orig/rpmlint-checks-master/CheckFilelist.py
+++ rpmlint-rpmlint-1.11/rpmlint-checks-master/CheckFilelist.py
@@ -425,8 +425,13 @@ class FilelistCheck(AbstractCheck.Abstra
         invalidfhs = set()
         invalidopt = set()
 
-        isSUSE = (pkg.header[RPMTAG_VENDOR] and
-                  b'SUSE' in pkg.header[RPMTAG_VENDOR])
+        isSUSE = False
+        if pkg.header[RPMTAG_VENDOR]:
+            vendor = pkg.header[RPMTAG_VENDOR]
+            if isinstance(vendor, str):
+                isSUSE = 'SUSE' in vendor
+            else:
+                isSUSE = b'SUSE' in vendor
 
         # the checks here only warn about a directory once rather
         # than reporting potentially hundreds of files individually