Improve operation efficiency about libsast

[ohyeah521]

When debugging, I found that when there is Java code in an apk that fails to decompile, the scan function will not exit, but I don't know how to fix it.

test code:

# -*- coding: utf_8 -*-

from pathlib import Path
from sast_engine import scan



api_rules =Path( r'./mobsf/StaticAnalyzer/views/android/rules/android_rules.yaml')
src=r'./mobsf/StaticAnalyzer/views/tests/'  # unzip the test file here.
skp = {
        'com/google/', 'androidx', 'okhttp2/', 'okhttp3/',
        'com/android/', 'com/squareup', 'okhttp/'
        'android/content/', 'com/twitter/', 'twitter4j/',
        'android/support/', 'org/apache/', 'oauth/signpost',
        'android/arch', 'org/chromium/', 'com/facebook',
        'org/spongycastle', 'org/bouncycastle',
        'com/amazon/identity/', 'io/fabric/sdk',
        'com/instabug', 'com/crashlytics/android',
        'kotlinx/', 'kotlin/',
        'cz/msebera/android/httpclient/',
        'com/loopj/android/http',
        'com/tencent/bugly/',
        'com/j256/',
    }
api_findings = scan(
            api_rules.as_posix(),
            {'.java', '.kt'},
            [src],
            skp)
print(api_rules)

test file:
C0067.zip