gen-egg-recipes: simpler command line syntax
gen-egg-recipes: simpler command line syntax

Now the recipes directory doesn't have to be specified.  Named
parameters are gone.  Now the only mandatory argument (not named) is
the eggs source directory.

Change-Id: Iaa79b53a6fbfd14034ec1b971833639f34d0ad52
Signed-off-by: Mario Domenech Goulart <addb47291ee169f330801ce73520b96f2eaf20ea@ossystems.com.br>

OSSystems/meta-chicken,OSSystems/meta-chicken,OSSystems/meta-chicken