utilities: Use localhost as sample hostname. #434

Job	Run time
osx clang --disable-ssl	3m 8s
linux rpm fedora	3m 56s
linux deb no dpdk	7m 37s
dpdk gcc	7s
clang-analyze	9m 32s
linux gcc --disable-ssl	2m 21s
linux clang --disable-ssl	2m 42s
linux gcc c99	2m 36s
linux clang c99	2m 32s
linux gcc test	8m 16s
linux clang address,undefined test	16m 10s
linux gcc test --enable-shared	10m 56s
linux clang test --enable-shared	11m 47s
linux gcc check check-dpdk dpdk	17m 13s
linux clang check check-dpdk dpdk	17m 44s
linux gcc test -ljemalloc	8m 46s
linux clang test -ljemalloc	8m 38s
linux gcc --enable-afxdp	2m 36s
linux clang --enable-afxdp	2m 33s
linux gcc dpdk --enable-shared	3m 19s
linux clang dpdk --enable-shared	3m 22s
linux gcc dpdk-shared	2m 53s
linux clang dpdk-shared	2m 46s
linux gcc dpdk-shared --enable-shared	3m 20s
linux clang dpdk-shared --enable-shared	3m 32s
linux gcc m32 --disable-ssl	2m 31s
linux gcc check-ovsdb-cluster	6m 19s
linux gcc check-kernel -100	8m 55s
linux gcc check-kernel 100-	8m 51s
linux clang address,undefined check-kernel -100	11m 9s
linux clang address,undefined check-kernel 100-	11m 36s
linux gcc check-offloads -100	8m 57s
linux gcc check-offloads 100-	7m 18s
linux gcc dpdk check-system-userspace	11m 28s
linux clang address,undefined dpdk check-system-userspace	14m 23s
linux gcc dpdk check-system-tso	10m 27s
linux gcc dpdk check-afxdp	10m 56s
	4h 31m 12s

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