Fix wrong PATH (remove "/usr/bin" suffix)

That suffix is no longer required because linuxdeployqt itself is now
also located in that directory.

linuxdeployqt/main.cpp

@@ -74,11 +74,11 @@ int main(int argc, char **argv)
         return 1;
     }
 
-    // Allow binaries in the usr/bin subdirectory to be found; this is useful for bundling
+    // Allow binaries next to linuxdeployqt to be found; this is useful for bundling
     // this application itself together with helper binaries such as patchelf
     QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
     QString oldPath = env.value("PATH");
-    QString newPath = QCoreApplication::applicationDirPath()+ "/usr/bin" + ":" + oldPath;
+    QString newPath = QCoreApplication::applicationDirPath() + ":" + oldPath;
     qDebug() << newPath;
     setenv("PATH",newPath.toUtf8().constData(),1);