scancode: skip non code files

For instance pdf, or binaries - catch them as an exception and skip for
additional SPDX check

tools/test/travis-ci/scancode-evaluate.py

@@ -81,7 +81,8 @@ def license_check(directory_name, file):
                     found_spdx = True
 
             if not found_spdx:
-                # Issue reported reported here https://github.com/nexB/scancode-toolkit/issues/1913
+                try:
+                    # Issue reported here https://github.com/nexB/scancode-toolkit/issues/1913
                     # We verify here if SPDX is not really there as SDPX is part of the license text
                     # scancode has some problems detecting it properly
                     with open(os.path.join(os.path.abspath(license_offender['file']['path'])), 'r') as spdx_file_check:
@@ -91,7 +92,9 @@ def license_check(directory_name, file):
                         continue
                     license_offender['reason'] = MISSING_SPDX_TEXT
                     offenders.append(license_offender)
-
+                except UnicodeDecodeError:
+                    # not valid file for license check
+                    continue
     except KeyError:
         userlog.warning("Invalid scancode json file")
         return -1