Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I4a90ca95fbb185fee160a96cf337494d8138fc8d
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index f0eb279..a2e5836 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@
 PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221])
 
 # Checks for header files.
-AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd developement package required])])
+AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd development package required])])
 AC_CHECK_HEADER(linux/ipmi_bmc.h,[HAVE_LINUX_IPMI_BMC_H=""],[HAVE_LINUX_IPMI_BMC_H="-I linux/ipmi_bmc.h"])
 AS_IF([test "$HAVE_LINUX_IPMI_BMC_H" != ""],
     AC_MSG_WARN([Could not find linux/ipmi-bmc.h: Attempting to download locally for building from https://raw.githubusercontent.com/torvalds/linux/master/include/uapi/linux/ipmi_bmc.h])