ogma-core: Tests are missing auxiliary files

[swt2c]

ogma-core 1.6.0 faces a similar problem as in #216.

Running 1 test suites...
Test suite unit-tests: RUNNING...
standalone-cmd-fcs-ok: [Failed]
The result of the transformation of input file tests/fcs_good.json to Copilot was unexpected.
standalone-cmd-fsc-file-not-found: [OK]
standalone-cmd-fcs-parse-fail-1: [OK]
standalone-cmd-fcs-parse-fail-2: [OK]
standalone-cmd-fcs-parse-fail-3: [OK]
standalone-reqs-db-cocospec: [Failed]
The result of the transformation of input file tests/fdb-example1.json to Copilot was unexpected.
structs-parse-ok: [Failed]
The result of the transformation of the C header file tests/reduced_geofence_msgs.h to Copilot struct declarations was unexpected.
structs-parse-fail-1: [OK]

         Test Cases  Total 
 Passed  5           5     
 Failed  3           3     
 Total   8           8     
Test suite unit-tests: FAIL
Test suite logged to: dist-ghc/test/ogma-core-1.6.0-unit-tests.log
0 of 1 test suites (0 of 1 test cases) passed.