Clarify --enable-ecap failure on missing shared library support (#1968) #277

Job	Run time
build-tests(ubuntu-22.04,gcc,default)	5m 15s
source-maintenance-tests	2m 46s
functionality-tests	18m 5s
build-tests(ubuntu-22.04,gcc,minimal)	4m 4s
build-tests(ubuntu-22.04,gcc,maximus)	6m 0s
CodeQL-tests	35m 9s
build-tests(ubuntu-22.04,clang,default)	6m 13s
build-tests(ubuntu-22.04,clang,minimal)	4m 57s
build-tests(ubuntu-22.04,clang,maximus)	6m 49s
	1h 29m 18s

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