packagegroup-base: s/dosfsprogs/dosfstools/

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
sanity.bbclass: non-zero status means that we need -march.

A non-zero status from the march test for gcc means that the "march" flag
is needed. Correct the logic to return True in this case.

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>