icecc.bbclass: Disable caret workaround by default
Icecream has a behavior that causes it to recompile files locally if gcc
generates any warnings or errors. The reason for this is that GCC tries
to re-read the input file in order to display the offending line with a
caret below it, which doesn't work in the remote chroot.
Default to disabling this this workaround and add
-fno-diagnostics-show-caret to the GCC flags so that errors and warnings
generated by GCC do not show erroneous results.
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
