Fix python-ajsonrpc #163

Job	Run time
Test Build / Test x86_64	17m 46s
Test Build / Test powerpc_464fp	17m 22s
Test Build / Test riscv64_generic	19m 25s
Test Build / Test arm_cortex-a15_neon-vfpv4	16m 59s
Test Build / Test i386_pentium-mmx	17m 19s
Test Build / Test powerpc_8548	17m 56s
Test Build / Test aarch64_generic	19m 45s
Test Build / Test arm_cortex-a9_vfpv3-d16	17m 3s
Test Build / Test mips_24kc	16m 57s
Test Build / Test mipsel_24kc	14m 47s
	2h 55m 19s

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