baresip: Use UCI for basic service configuration #290

Job	Run time
Feeds Package Test Build / Test aarch64_generic	39m 18s
Feeds Package Test Build / Test arm_cortex-a15_neon-vfpv4	37m 32s
Feeds Package Test Build / Test arm_cortex-a9_vfpv3-d16	37m 41s
Feeds Package Test Build / Test i386_pentium-mmx	38m 18s
Feeds Package Test Build / Test mips_24kc	34m 11s
Feeds Package Test Build / Test mipsel_24kc	34m 35s
Feeds Package Test Build / Test powerpc_464fp	34m 27s
Feeds Package Test Build / Test powerpc_8548	35m 3s
Feeds Package Test Build / Test riscv64_riscv64	34m 57s
Feeds Package Test Build / Test x86_64	40m 20s
	6h 6m 22s

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