Fix getApkDepBlockLength method to compute correct length
Fix getApkDepBlockLength method to compute correct length

Summary: Fix getApkDepBlockLength method. This method returns the expected length of the apk dep block. Since the method was changed to include the manifest crc in D32925460 (https://github.com/facebook/SoLoader/commit/4947e1ba8d185313529e313f1434dcb05af5dcab), but the getApkDepBlockLength was not updated, then compactso crashes because it can't calculate the expected length.

Differential Revision: D33060205

fbshipit-source-id: 35a28cc12b789b60da942dea7f84423657f8b636

facebook/SoLoader,facebook/SoLoader,facebook/SoLoader