fixes relative paths in scripts #170

Job	Run time
Check file changes	20s
Test on ubuntu-latest	2m 52s
Test on ubuntu-20.04	2m 58s
Test on Mac	15m 6s
Test Intel on ubuntu-20.04	9m 20s
Test run example 1 - meshfem3D simple model	3m 57s
Test run example 0 - make tests	6m 54s
Test run example 10 - homogeneous halfspace	2m 43s
Test run example 11 - poroelastic	4m 13s
Test run example 12 - PML elastic	2m 35s
Test run example 2 - fault tpv5	5m 24s
Test run example 3 - layered halfspace	3m 19s
Test run example 4 - small adjoint	3m 50s
Test run example 5 - socal1D	3m 37s
Test run example 6 - socal1D 1d_socal	3m 12s
Test run example 7 - socal1D 1d_prem	3m 25s
Test run example 9 - coupling FK	3m 34s
Test run example 8 - socal1D 1d_cascadia	3m 15s
Test run example 13 - PML acoustic	2m 28s
Test run example 14 - waterlayered halfspace	3m 35s
Test run example 15 - tomographic model	2m 39s
Test run example 17 - sep bathymetry	2m 57s
Test run example 16 - cavity	2m 33s
	1h 34m 46s

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