buildroot

kmod: add patch to fix build failure with old gcc versions

When building with old gcc versions (such as gcc 4.3), the current
version of kmod fails with:

shared/util.c:52: error: expected identifier or '(' before 'do'
shared/util.c:52: error: expected identifier or '(' before 'while'

This is due to a use of the internal assert_cc() macro outside of a
function, while this macro is defined for old gcc versions in a way that
cannot be used outside functions.

This wasn't noticed by the autobuilders because we don't have such old
target compilers. On the host side, we have some autobuilder instances
with such old gcc versions, but host-kmod is only used by the linux
package, which is never tested by the autobuilders.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 72c77544bad2491c55db6268e464f2c0e63f0adc)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>