cmake: unbreak USE_SYSTEM_FLATBUFFERS #12089
Merged
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Regressed by #12014. Tested downstream. execute_process() seems to take arguments as separate words: replacing
${STATUS}
with${FBS_CMD_ERROR}
led toNo such file or directory
.RESULT_VARIABLE
is populated with1
if what fails is notexecute_process
butflatc
whileexecute_process
already shows stderror contents by default.