ci: Enable CodeQL checking #180

Job	Run time
buildroot (qemu_x86_defconfig, glibc)	2m 24s
buildroot (qemu_x86_defconfig, uclibc)	2m 9s
buildroot (qemu_x86_defconfig, musl)	1m 56s
buildroot (qemu_x86_64_defconfig, glibc)	2m 46s
buildroot (qemu_x86_64_defconfig, uclibc)	1m 36s
buildroot (qemu_x86_64_defconfig, musl)	1m 38s
buildroot (raspberrypi4_defconfig, glibc)	1m 51s
buildroot (raspberrypi4_defconfig, uclibc)	1m 40s
buildroot (raspberrypi4_defconfig, musl)	1m 33s
buildroot (raspberrypi4_64_defconfig, glibc)	1m 39s
buildroot (raspberrypi4_64_defconfig, uclibc)	1m 47s
buildroot (raspberrypi4_64_defconfig, musl)	1m 38s
buildroot (qemu_ppc64le_pseries_defconfig, glibc)	1m 40s
buildroot (qemu_ppc64le_pseries_defconfig, uclibc)	1m 46s
buildroot (qemu_ppc64le_pseries_defconfig, musl)	2m 12s
buildroot (qemu_mips32r2_malta_defconfig, glibc)	1m 38s
buildroot (qemu_mips32r2_malta_defconfig, uclibc)	2m 18s
buildroot (qemu_mips32r2_malta_defconfig, musl)	1m 47s
buildroot (qemu_mips64_malta_defconfig, glibc)	1m 58s
buildroot (qemu_mips64_malta_defconfig, uclibc)	1m 32s
buildroot (qemu_mips64_malta_defconfig, musl)	2m 36s
buildroot (qemu_riscv32_virt_defconfig, glibc)	1m 39s
buildroot (qemu_riscv32_virt_defconfig, uclibc)	1m 40s
buildroot (qemu_riscv32_virt_defconfig, musl)	1m 49s
buildroot (qemu_riscv64_virt_defconfig, glibc)	1m 44s
buildroot (qemu_riscv64_virt_defconfig, uclibc)	1m 36s
buildroot (qemu_riscv64_virt_defconfig, musl)	2m 4s
	50m 36s

Provide feedback