Add back 'android' and 'ios' for is_posix, and fix check for bsd.
Add back 'android' and 'ios' for is_posix, and fix check for bsd.

BUG=none
R=thakis@chromium.org

Review URL: https://codereview.chromium.org/135273011

git-svn-id: 50c90c531a9fd8f38831f054b7ea6b96f50d91dc@149 7262f16d-afe8-6277-6482-052fa10e57b1

geekboxzone/lollipop_external_chromium_org_tools_grit,Omegaphora/external_chromium_org_tools_grit,bpsinc-native/src_tools_grit,android-ia/platform_external_chromium_org_tools_grit,geekboxzone/lollipop_external_chromium_org_tools_grit,Omegaphora/external_chromium_org_tools_grit,bpsinc-native/src_tools_grit,android-ia/platform_external_chromium_org_tools_grit,xin3liang/platform_external_chromium_org_tools_grit,AOSPU/external_chromium_org_tools_grit