Fix a few build problems on Solaris (and check for an md5 utility in

configure instead of the icky loop I was doing before).

(closes issue #13842)
Reported by: snuffy
Patches:
      bug13842_20081106.diff uploaded by snuffy (license 35)
      13842.diff uploaded by seanbright (license 71)
Tested by: snuffy


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@157600 65c4cc65-6c06-0410-ace0-fbb531ad65f3

build_tools/make_version

@@ -30,7 +30,7 @@ elif [ -d .svn ]; then
       fi
 
       if [ ${BRANCH} != 0 ] ; then
-	  if [ -z ${RESULT} ] ; then
+	  if [ -z "${RESULT}" ] ; then
 	    RESULT="${PART}"
 	  else
 	    RESULT="${RESULT}-${PART}"
@@ -39,7 +39,7 @@ elif [ -d .svn ]; then
       fi
 
       if [ ${TEAM} != 0 ] ; then
-	  if [ -z ${RESULT} ] ; then
+	  if [ -z "${RESULT}" ] ; then
 	    RESULT="${PART}"
 	  else
 	    RESULT="${RESULT}-${PART}"