feat: add debug build option #268

Job	Run time
Run unit tests	38s
Run unit tests without uci support	1m 5s
Run integration tests (-DUA2F_NO_CACHE=ON)	1m 24s
Run integration tests (-DUA2F_NO_CACHE=OFF)	1m 3s
Build aarch64_cortex-a53	9m 0s
Build aarch64_cortex-a72	9m 6s
Build aarch64_generic	9m 11s
Build arm_cortex-a7_neon-vfpv4	9m 41s
Build arm_cortex-a9_vfpv3-d16	9m 0s
Build arm_cortex-a15_neon-vfpv4	9m 3s
Build i386_pentium4	9m 29s
Build i386_pentium-mmx	9m 41s
Build mips_24kc	9m 6s
Build mipsel_24kc	9m 3s
Build powerpc_464fp	9m 45s
Build powerpc_8548	9m 5s
Build x86_64	9m 57s
	2h 5m 17s

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