[svn-r12384] Purpose:

feature.

Description:
Added the option of -64 which is similar to -n32.  This is needed by
Atlantia which has the ABI as -n32.

Platforms tested:
Pretty straight forward but not testable by h5committest.
Will be tested when daily tests run.

bin/runtest

@@ -290,6 +290,11 @@ RUNSNAPTEST()
 		CC="cc -n32"
 		export CC
 		;;
+	    -64) # want -64 option
+		SRCDIRNAME=${SRCDIRNAME}-64
+		CC="cc -64"
+		export CC
+		;;
 	    parallel) # want parallel test
 		SNAPCMD_OPT="$SNAPCMD_OPT $ENABLE_PARALLEL"
 		SRCDIRNAME=${SRCDIRNAME}-pp