[qa] Test extraction of BCD file from WIM image

Default to extracting the BCD file from the WIM image, and ensure that
a test case exists to cover live-patching of an explicitly provided
BCD file.

Signed-off-by: Michael Brown <mbrown@fensystems.co.uk>

Author: mcb30

test/testwimboot

@@ -230,7 +230,7 @@ for test_file in args.test:
     uefi = test.get('uefi', False)
     memory = test.get('memory', 2048)
     bootmgr = test.get('bootmgr', False)
-    bcd = test.get('bcd', True)
+    bcd = test.get('bcd', False)
     bootsdi = test.get('boot.sdi', False)
     bootargs = test.get('bootargs', '')
     logcheck = test.get('logcheck', [])

test/win8_uefi.yml

@@ -2,3 +2,6 @@ name: Windows 8 (UEFI)
 version: win8
 arch: x64
 uefi: true
+bcd: true
+logcheck:
+  - 'patched BCD at 0x[0-9a-f]+: ".exe" to ".efi"'