The ornamental design for an electronic-control brake system, as shown and described.
FIG. 1 is a perspective view of the electronic-control brake system;
FIG. 2 is a front view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a right side view thereof.
The broken lines and the deemphasized areas within them depict portions of the electronic-control brake system that form no part of the claimed design.