bc: Provide native version needed for newer kernel

:Release Notes:
Linux kernel 3.10 and newer needs bc-native dependency instead of
perl-native. Linux kernel commit 70730bca [kernel: Replace timeconst.pl
with a bc script] added a kernel dependency on bc.

:Detailed Notes:
Backport of
http://git.openembedded.org/openembedded-core/commit/?id=2138961cc75be2690f2f9b5df8cb2d810dcebc99

:Testing Performed:
Build tested with linux-yocto-3.10.

:QA Notes:
No change in image.

:Issues Addressed:
[GF-32604] Linux kernel 3.10 requires native "bc" command

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: I9a97db65dc9a1f17f8d2db601bcc8bc02f742999
Reviewed-on: https://g2g.palm.com/3190
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>