configure: missing check for needed header

configure: missing check for needed header

Based on autoscan diagnostic:

autoscan: warning: missing AC_CHECK_HEADERS([arpa/inet.h]) wanted by:
	src/common/uri.c:21
	src/common/sessiond-comm/sessiond-comm.h:38
	src/bin/lttng/utils.c:28
autoscan: warning: missing AC_CHECK_HEADERS([netdb.h]) wanted by:
	src/common/uri.c:22
autoscan: warning: missing AC_CHECK_HEADERS([netinet/in.h]) wanted by:
	src/common/uri.h:21
	src/common/sessiond-comm/sessiond-comm.h:39
	src/bin/lttng/utils.c:27
autoscan: warning: missing AC_CHECK_HEADERS([paths.h]) wanted by:
	src/common/daemonize.c:22
	src/bin/lttng-sessiond/main.c:25
autoscan: warning: missing AC_CHECK_HEADERS([stddef.h]) wanted by:
	src/common/defaults.c:20
	src/common/hashtable/rculfhash-mm-chunk.c:25
	src/bin/lttng-sessiond/ust-clock.h:26
autoscan: warning: missing AC_CHECK_HEADERS([sys/file.h]) wanted by:
	src/common/utils.c:34
autoscan: warning: missing AC_CHECK_HEADERS([sys/ioctl.h]) wanted by:
	src/common/kernel-ctl/kernel-ctl.c:22
autoscan: warning: missing AC_CHECK_HEADERS([sys/mount.h]) wanted by:
	src/bin/lttng-sessiond/main.c:33
	src/bin/lttng-relayd/live.c:30
	src/bin/lttng-relayd/main.c:31
autoscan: warning: missing AC_CHECK_HEADERS([sys/param.h]) wanted by:
	src/common/hashtable/utils.c:57
autoscan: warning: missing AC_CHECK_HEADERS([sys/time.h]) wanted by:
	src/common/compat/compat-poll.c:23
	src/bin/lttng-sessiond/ust-clock.h:24
	src/bin/lttng-sessiond/fd-limit.c:21

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>