github: Skip clang-analyze when reference generation fails. #2566

Job	Run time
dpdk gcc (ubuntu-24.04)	9s
linux deb no dpdk	6m 58s
libreswan (ubuntu-24.04)	8s
linux rpm fedora	4m 8s
osx clang --disable-ssl	1m 33s
clang-analyze-cache	10m 42s
linux gcc --disable-ssl	3m 57s
linux clang --disable-ssl	4m 30s
linux gcc c99	2m 46s
linux clang c99	2m 42s
linux gcc test	8m 28s
linux clang address,undefined test	16m 25s
linux gcc test --enable-shared	11m 51s
linux clang test --enable-shared	11m 12s
linux gcc check check-dpdk dpdk	18m 28s
linux clang check check-dpdk dpdk	18m 24s
linux gcc test -ljemalloc	9m 9s
linux clang test -ljemalloc	9m 20s
linux gcc --enable-afxdp	2m 38s
linux clang --enable-afxdp	2m 45s
linux gcc dpdk --enable-shared	3m 58s
linux clang dpdk --enable-shared	4m 1s
linux gcc dpdk-shared	2m 59s
linux clang dpdk-shared	2m 50s
linux gcc dpdk-shared --enable-shared	3m 52s
linux clang dpdk-shared --enable-shared	4m 47s
linux gcc m32 --disable-ssl	2m 25s
linux gcc check-ovsdb-cluster	6m 41s
linux gcc check-kernel -100	10m 59s
linux gcc check-kernel 100-	16m 57s
linux clang address,undefined check-kernel -100	13m 6s
linux clang address,undefined check-kernel 100-	18m 7s
linux gcc check-offloads -100	10m 11s
linux gcc check-offloads 100-	11m 17s
linux gcc dpdk check-system-userspace	14m 12s
linux clang address,undefined dpdk check-system-userspace	16m 32s
linux gcc dpdk check-system-tso	12m 15s
linux gcc dpdk check-afxdp	11m 50s
clang-analyze	10m 32s
	5h 23m 44s

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