import_otherdistro: try-specfile: handle files in current dir

The try-specfile subcommand is for testing, so it's entirely possible
the spec file we are testing with will be in the current directory;
os.path.dirname() returns '' in this case, which os.path.relpath() then
chokes on. Avoid this in the easiest way possible by just prepending ./
to the path in this case.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

layerindex/tools/import_otherdistro.py

@@ -603,6 +603,9 @@ def try_specfile(args):
         return ret
 
     specfile = args.specfile
+    # Hack to handle files in the current directory
+    if not os.sep in specfile:
+        specfile = '.' + os.sep + specfile
     metapath = os.path.dirname(specfile)
 
     try: