ipsec: libreswan: Reduce chances for crossing streams. #3171

Job	Run time
dpdk gcc	6s
osx clang --disable-ssl	1m 27s
linux deb no dpdk	4m 7s
linux gcc --disable-ssl	2m 18s
linux clang --disable-ssl	2m 1s
linux gcc c99	3m 54s
linux clang c99	2m 7s
linux gcc test	7m 45s
linux clang test asan	13m 1s
linux clang test ubsan	9m 36s
linux gcc test --enable-shared	10m 10s
linux clang test --enable-shared	10m 18s
linux gcc test dpdk	8m 36s
linux clang test dpdk	7m 32s
linux gcc test -ljemalloc	8m 47s
linux clang test -ljemalloc	8m 6s
linux gcc --enable-afxdp	1m 56s
linux clang --enable-afxdp	1m 59s
linux gcc dpdk --enable-shared	3m 31s
linux clang dpdk --enable-shared	2m 47s
linux gcc dpdk-shared	2m 27s
linux clang dpdk-shared	2m 17s
linux gcc dpdk-shared --enable-shared	2m 52s
linux clang dpdk-shared --enable-shared	2m 45s
linux gcc m32 --disable-ssl	2m 23s
	2h 2m 48s

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