layers: Add fix for lx172 to catch invalid line widths.

Validate line wdith in both vkCreateGraphicsPipelines and in
vkCmdSetLineWidth.  Also, add a warning in vkCmdSetLineWidth
if the user calls it but doesn't enable dynamic line width.

Also, updated demos to fix missing lineWidth setting as well.

Change-Id: I62118da9cb5282fcc22b1506e9be2db82b5f4a40
2 files changed