Add new APIs for filling colour with horizontal/vertical line mask

[GorgonMeducer]

Line masks are useful for saving memory and effectively replacing masks that repeat the same lines of pixel horizontally and vertically.

In the scene template: alarm-clock, the mask

extern const arm_2d_tile_t c_tileECGScanMask

is a typical example that should be replaced by a line mask.

We should add the following APIs:

• Fill colour with horizontal line mask (with/without opacity)
• Fill colour with vertical line mask (with/without opacity)

[GorgonMeducer]

Added the following APIs for gray8, rgb565 and cccn888:

• arm_2d_fill_colour_with_horizontal_line_mask_and_opacity
• arm_2d_fill_colour_with_horizontal_line_mask

[GorgonMeducer]

Added the following APIs for gray8, rgb565 and cccn888:

• arm_2d_fill_colour_with_vertical_line_mask_and_opacity
• arm_2d_fill_colour_with_vertical_line_mask