The danctnix-series cover letter had an invalid 41-hex-char
placeholder SHA on its 'From' header line (40 zeros with an
f1d22ab0 prefix) -- a relic of manual generation. Replaced with
the valid 40-char SHA already used by the Mobian-series cover
letter. The value is cosmetic (cover letters aren't real commits)
but an invalid SHA will confuse 'git am'.
test0r
92913816ab