awk invocation cleanup for busybox support.

These changes make it possible to run more of the tests on busybox.

Signed-off-by: Ari Sundholm <ari@tuxera.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

common/punch

@@ -203,7 +203,7 @@ _coalesce_extents()
 
 _filter_fiemap()
 {
-	awk --posix '
+	$AWK_PROG '
 		$3 ~ /hole/ {
 			print $1, $2, $3;
 			next;
@@ -223,7 +223,7 @@ _filter_fiemap()
 # it is an extent or a hole
 _filter_hole_fiemap()
 {
-	awk --posix '
+	$AWK_PROG '
 		$3 ~ /hole/ {
 			print $1, $2, $3; 
 			next;

tests/generic/273

@@ -68,7 +68,7 @@ _file_create()
 
 	cd $SCRATCH_MNT/origin
 
-	_disksize=`$DF_PROG --block-size=1 $SCRATCH_DEV | tail -1 | awk '{ print $5 }'`
+	_disksize=`$DF_PROG -B 1 $SCRATCH_DEV | tail -1 | $AWK_PROG '{ print $5 }'`
 	_disksize=$(($_disksize / 3))
 	_num=$(($_disksize / $count / $threads / 4096))
 	_count=$count