devtool: ide-sdk source mapping for vscode

devtool: ide-sdk source mapping for vscode

When launching the debug configuration, the source files from the debug
rootfs were openened in the editor instead of the local workspace files.
We add an exception to properly map them to the file being developed and
compiled by the IDE integration. This also more closely matches what the
user would expect compared to native development.

This is also true for the devtool fallback mode.

Signed-off-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@savoirfairelinux.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>