add pkg-config dep #4393

Job	Run time
Check	24s
Check Cargo.lock (.)	9s
Build (aliveness)	11s
Check Cargo.lock (tools/aliveness)	15s
Check Cargo.lock (tools/hula)	11s
Build (behavior_simulator, release)	10s
Build (annotato)	13s
Check parameters	9s
Build (behavior_simulator, dev)	24s
Build (camera_matrix_extractor)	11s
Format	10s
Build (imagine, release)	13s
Build (depp)	11s
Build (fanta)	16s
Build (imagine, dev)	14s
Test	23s
Build (hula)	9s
Build (pepsi)	18s
Build (nao, release)	11s
Build (twix)	10s
Build (nao, dev)	51s
Build (replayer, release)	13s
Build (replayer, dev)	10s
Build (webots, release)	11s
Build (webots, dev)	27s
	6m 24s

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