Bug 1041982 - Update dhcpcd, wpa_supplicant_8 and yaffs2 to specific branch. r=james.zhang

Change-Id: Icd796c68af3f3535de1e8450432c771acf9bc172
Merge pull request #205 from Seinlin/bug-1041982-m

Bug 1041982 - Update dhcpcd, wpa_supplicant_8 and yaffs2 to specific bra...