Use explicitly sized types in zipalign/ziptime

getLongLE would return a 64-bit number with the upper 32-bits set when
decoding a 32-bit number with the top bit set. Per the zip file format,
it was only expected to return a 32-bit number. Use explicitly sized
types so that we use the proper sizes and don't do any implicit
extensions.

Change-Id: I5a4304dc99ce5f8f17284d4ca3094ae115207a1e

tools/ziptime/ZipFile.h

@@ -51,10 +51,10 @@ private:
     public:
         EndOfCentralDir(void) : mTotalNumEntries(0), mCentralDirOffset(0) {}
 
-        status_t readBuf(const unsigned char* buf, int len);
+        status_t readBuf(const uint8_t* buf, int len);
 
-        unsigned short  mTotalNumEntries;
-        unsigned long   mCentralDirOffset;      // offset from first disk
+        uint16_t mTotalNumEntries;
+        uint32_t mCentralDirOffset;      // offset from first disk
 
         enum {
             kSignature      = 0x06054b50,