config: fix compilation with FLB_HAVE_STATIC_CONF. #8411

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	12m 19s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	12m 11s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	11m 33s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	11m 33s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	11m 44s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	12m 29s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	11m 53s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	11m 52s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	11m 57s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	11m 54s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	42m 52s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	11m 37s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	12m 0s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	11m 38s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	11m 43s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	12m 10s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	10m 19s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	11m 31s
Unit tests (matrix)	1s
	4h 3m 16s

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