scripts: allow logging of commands with variables
In a lot of places, we need to call some commands with specific
variable settings, a-la:
var1=val1 var2=val2 /foo/bar/buz opt1 opt2
Unfortunately, we currently can not log the variable settings.
Enhance CT_DoExecLog with a crude heuristic that works pretty well
and that can also log setting variables.
Reported-by: ANDY KENNEDY <ANDY.KENNEDY@adtran.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>