Improve message when repo submods not initialized #119

Job	Run time
GCC 7 - CMake 0 - FIPS 0	4m 35s
GCC 4.8 - CMake 0 - FIPS 0	6m 33s
GCC 4.8 - CMake 0 - FIPS 1	8m 30s
GCC 5 - CMake 0 - FIPS 0	6m 27s
GCC 7 - CMake 0 - FIPS 1	5m 58s
GCC 5 - CMake 0 - FIPS 1	7m 33s
GCC 8 - CMake 0 - FIPS 0	4m 25s
GCC 6 - CMake 0 - FIPS 0	6m 27s
GCC 8 - CMake 0 - FIPS 1	5m 19s
GCC 7 - CMake 1 - FIPS 0	4m 8s
GCC 6 - CMake 0 - FIPS 1	7m 42s
GCC 4.8 - CMake 1 - FIPS 0	6m 18s
GCC 7 - CMake 1 - FIPS 1	6m 0s
GCC 4.8 - CMake 1 - FIPS 1	7m 52s
GCC 8 - CMake 1 - FIPS 0	4m 2s
GCC 5 - CMake 1 - FIPS 0	6m 36s
GCC 8 - CMake 1 - FIPS 1	5m 22s
GCC 5 - CMake 1 - FIPS 1	7m 47s
GCC 6 - CMake 1 - FIPS 0	6m 31s
GCC 6 - CMake 1 - FIPS 1	9m 14s
C-std ubuntu-latest - 11 - Force CMake 0	1m 58s
C-std ubuntu-latest - 11 - Force CMake 1	2m 1s
C-std ubuntu-latest - 99 - Force CMake 0	1m 54s
C-std ubuntu-latest - 99 - Force CMake 1	1m 53s
C-std macos-13 - 11 - Force CMake 0	2m 27s
C-std macos-13 - 11 - Force CMake 1	3m 4s
C-std macos-13 - 99 - Force CMake 0	3m 19s
C-std macos-13 - 99 - Force CMake 1	2m 48s
C-std macos-14-xlarge - 11 - Force CMake 0	1m 37s
C-std macos-14-xlarge - 11 - Force CMake 1	1m 28s
C-std macos-14-xlarge - 99 - Force CMake 0	1m 30s
C-std macos-14-xlarge - 99 - Force CMake 1	1m 27s
C-std windows-latest - 11 - Force CMake 0	4m 41s
C-std windows-latest - 11 - Force CMake 1	3m 29s
C-std windows-latest - 99 - Force CMake 0	4m 17s
C-std windows-latest - 99 - Force CMake 1	4m 31s
	2h 49m 43s

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