configure: remove cross_cc and gdb detection logic

We have now implemented the same in meson directly, so no need to keep
it on configure side. Also, we have no more Makefile consumers, so we
don't need to export all those variables anymore.

Tested-by: Aniket Sahu <asahu1x@linux.ibm.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Message-ID: <20260827221506.91574-103-pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
1 file changed