configs: Build-test QEMU i440fx with AddressSanitizer (ASan)

The artifacts can then be run on test system.

Change-Id: I2300af7b9be5fbb42a874566971854b93292885e
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51293
Reviewed-by: Harshit Sharma <harshitsharmajs@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

configs/config.emulation_qemu_x86_i440fx_asan

@@ -0,0 +1 @@
+CONFIG_ASAN=y