It has been almost 3 months since the upgrade to gcc 10. Switch back to
relying on gcc default configuration (-fno-common).
This reverts OE-Core commit 951e859b1e8297970278c539e989b8a6d06a9cb3.
(From OE-Core rev: 4ee733e1551d3960a23a600eb71a01cf7a51fa06)
Signed-off-by: Jacob Kroon <jacob.kroon@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>