Security Vulnerability - CVE-2012-6702 and CVE-2016-5300

Applies the patch from the bug. The change to CMakeLists.txt is
not applicable as Android does not use that to build expat. It
is not needed as it only applies to building for Windows.

Fix cast from pointer to integer of different size

Test: make
Bug: 29149404
Change-Id: I83644220db8652d7ba818d71bc4d6f86a37881f6
1 file changed