configs/warp7: bump to Linux 5.0.9 and U-Boot 2019.01

This commit bumps Linux & Linux-headers to 5.0 and U-Boot to version 2019.01

Signed-off-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Signed-off-by: Pierre-Jean Texier <a class="moz-txt-link-rfc2396E" href="mailto:pjtexier@koncepto.io">&lt;pjtexier@koncepto.io&gt;</a>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>