fix build error during gbs funtion test

fix build error during gbs funtion test
https://github.com/agx/git-buildpackage/commit/1b5a47f4bda5d8809998750c3a35b4e02c8b2851
https://github.com/agx/git-buildpackage/commit/1b5a47f4bda5d8809998750c3a35b4e02c8b2851

modify patch file wrong encoding.
https://github.com/agx/git-buildpackage/commit/c4bc6561c788f71b5131d0bd8e92478e83808200
pq: don't eagerly encode email headers
https://github.com/agx/git-buildpackage/commit/9dc2129c4448416f43300ce859f1e1f4a1070048
pq: properly retry non-ascii charset on patch body encode
https://github.com/agx/git-buildpackage/commit/04ae7d5654684d8077a4125c90e36f4195057fa9
git: Don't decode diff output
https://github.com/agx/git-buildpackage/commit/c159d0ba16636bc3692b89555b258a3bc7907902
pq export: Write out patches as UTF-8 if necessary
Change-Id: I6982c800361b8cc1ad4c16211fca450803e5eb02
Signed-off-by: biao716.wang <biao716.wang@samsung.com>