Fix ECC validation regression #297

Job	Run time
load-targets	7s
analyze (gcc-arm-cortex-m4, gcc-arm, cortex-m4, sudo apt-get update && sudo apt-get install -y gc...	2m 5s
analyze (gcc-arm-cortex-m4-baremetal, gcc-arm, cortex-m4-baremetal, sudo apt-get update && sudo a...	1m 52s
analyze (gcc-arm-cortex-m4-min-ecc, gcc-arm, cortex-m4-min-ecc, sudo apt-get update && sudo apt-g...	1m 59s
analyze (gcc-arm-cortex-m4-tls12, gcc-arm, cortex-m4-tls12, sudo apt-get update && sudo apt-get i...	2m 29s
	8m 32s

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