Revert "lenovo/t400/4.5-1564-g6fa36c9c2c-dirty/2017-04-16T13_28_27Z"

This reverts commit e5454d36ca2f96e452a228db9a1485bff2e8f32e.

The commit in question deletes a lot of unrelated files, and needs to be
reverted.
diff --git a/emulation/qemu-q35/4.2-736-g45a221d/2016-01-14T18:17:01Z/rom_checksum.txt b/emulation/qemu-q35/4.2-736-g45a221d/2016-01-14T18:17:01Z/rom_checksum.txt
new file mode 100644
index 0000000..791db2f
--- /dev/null
+++ b/emulation/qemu-q35/4.2-736-g45a221d/2016-01-14T18:17:01Z/rom_checksum.txt
@@ -0,0 +1 @@
+5e891d5f16e1ed9ef61d57284725c4da *build/coreboot.rom