wic: plugins source bootimage/isoimage rename to allow be imported

Python not support importing modules with - so change to _.

Signed-off-by: Anibal Limon <anibal@limonsoftware.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/lib/wic/plugins/source/bootimg-biosplusefi.py b/scripts/lib/wic/plugins/source/bootimg_biosplusefi.py
similarity index 100%
rename from scripts/lib/wic/plugins/source/bootimg-biosplusefi.py
rename to scripts/lib/wic/plugins/source/bootimg_biosplusefi.py

diff --git a/scripts/lib/wic/plugins/source/bootimg-efi.py b/scripts/lib/wic/plugins/source/bootimg_efi.py
similarity index 100%
rename from scripts/lib/wic/plugins/source/bootimg-efi.py
rename to scripts/lib/wic/plugins/source/bootimg_efi.py

diff --git a/scripts/lib/wic/plugins/source/bootimg-partition.py b/scripts/lib/wic/plugins/source/bootimg_partition.py
similarity index 100%
rename from scripts/lib/wic/plugins/source/bootimg-partition.py
rename to scripts/lib/wic/plugins/source/bootimg_partition.py

diff --git a/scripts/lib/wic/plugins/source/bootimg-pcbios.py b/scripts/lib/wic/plugins/source/bootimg_pcbios.py
similarity index 100%
rename from scripts/lib/wic/plugins/source/bootimg-pcbios.py
rename to scripts/lib/wic/plugins/source/bootimg_pcbios.py

diff --git a/scripts/lib/wic/plugins/source/isoimage-isohybrid.py b/scripts/lib/wic/plugins/source/isoimage_isohybrid.py
similarity index 100%
rename from scripts/lib/wic/plugins/source/isoimage-isohybrid.py
rename to scripts/lib/wic/plugins/source/isoimage_isohybrid.py