default.bmpblk --> bmpblk.bin

This renames the bmpblk file so that it corresponds to what
chromeos-bmpblk installs.

BUG=none
TEST=cros_bundle_firmware no longer complains about missing bmpblk
after re-emerging chroemos-bmpblk

Original-Change-Id: I28ed3a65f95d93bc550de3f9ae7af938f6daf18d
Reviewed-on: https://gerrit.chromium.org/gerrit/31025
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Ready: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit bdecc54d67efa669833c7bd0559c7b2761ef0421)

Change-Id: I942ab0710a066dde1a6f6dc81400a7f055bce723
Reviewed-on: https://gerrit.chromium.org/gerrit/31622
Tested-by: Puneet Kumar <puneetster@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
diff --git a/host/lib/bundle_firmware.py b/host/lib/bundle_firmware.py
index 7de8d68..a22077a 100644
--- a/host/lib/bundle_firmware.py
+++ b/host/lib/bundle_firmware.py
@@ -188,7 +188,7 @@
     if not self.bct_fname:
       self.bct_fname = os.path.join(build_root, 'bct', 'board.bct')
     if not self.bmpblk_fname:
-      self.bmpblk_fname = os.path.join(build_root, 'default.bmpblk')
+      self.bmpblk_fname = os.path.join(build_root, 'bmpblk.bin')
     if not self.exynos_bl1:
       self.exynos_bl1 = os.path.join(build_root, 'E5250.nbl1.bin')
     if not self.exynos_bl2: