Remove reference to Appendix in BuildGuide

Appendix was removed in change I8859ba42420d351ce12347cd63bf11f95a4b528d

Fixed some wording.

Change-Id: I3ad585b67532a4a44bf272d8ebfefec03ec3cc12
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
Issue-ID: OOM-2158
1 file changed