config/git: import suckless sbase

i currently use the output of sha512sum in several
places of xbmk, which is a bit unreliable in case
output changes.

other cases where i use util outputs in variables
are probably reliable, because i'm using mostly
posix utilities in those.

to mitigate this, i now import suckless sbase, which
has a reasonable sha512sum implementation.

*every* binary it builds is being placed in build.list,
because i'll probably start using more of them.

for example, i may start modifying the "date"
implementation, adding the GNU-specific options that
i need as mentioned on init.sh

i'm importing it in util/ because the sha512sum
util is needed for verifying project sources, so
if sbase itself is a "project source", that means
we can into a chicken and egg bootstrapping problem.

this is sbase at revision:
055cc1ae1b3a13c3d8f25af0a4a3316590efcd48

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/sbase/time.1

@@ -0,0 +1,45 @@
+.Dd October 8, 2015
+.Dt TIME 1
+.Os sbase
+.Sh NAME
+.Nm time
+.Nd time a command
+.Sh SYNOPSIS
+.Nm
+.Op Fl p
+.Ar cmd
+.Op Ar arg ...
+.Sh DESCRIPTION
+.Nm
+executes
+.Ar cmd
+and writes timing statistics to stderr after it finishes.
+The statistics include the elapsed real time
+between invocation and termination and the user
+and system CPU time (see
+.Xr times 2 ) .
+.Sh OPTIONS
+.Bl -tag -width Ds
+.It Fl p
+Use the format "real %f\enuser %f\ensys %f\en" for printing.
+This is the default.
+.El
+.Sh EXIT STATUS
+.Bl -tag -width Ds
+.It 0
+.Ar cmd
+executed successfully.
+.It 1
+Internal error.
+.It 126
+.Ar cmd
+was found but could not be executed.
+.It 127
+.Ar cmd
+could not be found.
+.El
+.Sh SEE ALSO
+.Xr times 2 ,
+.Xr waitpid 2
+.Sh STANDARDS
+POSIX.1-2013.