waf: Upgrade to the latest release waf-1.9.9.

This fixes build problems on FreeBSD 11 where gcc/g++ was being
selected over clang and exceptions did not work.
This commit is contained in:
Chris Johns
2017-04-03 20:24:06 +10:00
parent bce090b242
commit 5ca8badd2e

18
waf vendored

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