fixes #120360: look for boost in multiarch path
fixes #120360: look for boost in multiarch path

Change-Id: I849045414ae4ded7cfb3a489f35c95421d3df8a7
Signed-off-by: Kefu Chai <ef1142690fdf7c5d47bbd7e2a7a410478308cc21@mozy.com>
Reviewed-on: https://gerrit.dechocorp.com/66145
Reviewed-by: Jenkins <49695b0f9c673fd73dab0ff3f84b5ced9302cc6a@mozy.com>
Reviewed-by: Kevin Cai <c4f49ef5a44534d46de426dda18a118a2ca4debf@mozy.com>
Reviewed-by: Curtis Veit <c5a9b12c1c8813f5f80d6b6ba813c9cd631a0edc@mozy.com>

mozy/mordor,mozy/mordor,mozy/mordor