Loading program binaries across different architectures would cause
runtime errors due to use of size_t.

Also fix the ANGLE major and minor version that were clobbered in an
earlier commit.

BUG=angle:647
BUG=371435

Change-Id: I9473cc7e119592fce336aa47881839543e337b69
Reviewed-on: https://chromium-review.googlesource.com/199633Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>