title: How to solve "Note: duplicate definition of library class"?
body: <p>I have <code>jar</code> libraries in folder <code>libs</code></p>
  
  <p>My <code>gradle</code> has:</p>
  
  <pre><code>buildTypes {
          release {
              minifyEnabled true
  ...
  dependencies {
   compile fileTree(dir: 'libs', include: ['*.jar'])
  ...
  </code></pre>
  
  <p>After running <code>release</code> version I have this error:</p>
  
  <p><code>Note: duplicate definition of program class [com.splunk.mint.ActionError]
  ...</code></p>
  
  <p>I already tried to add to proguard 
  <code>-injars libs</code>
  . But Issue still happens...</p>