[build] Fix build script of yasm

This change fix the build issues caused by python2 to 3
incompatibility.

Bug: 62466
Change-Id: I4ef8b1401a847170e62e83f72accb861bab7c8a8
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/yasm/+/441917
Reviewed-by: Petr Hosek <phosek@google.com>
1 file changed