xfstests: introduce a common directory

Introduce a top level common directory and move all the common.*
files into it.  Because there is now a directory named common, the
prefix can be dropped from all the files. Convert all the tests to
use this new directory for including common files.

for f in common.*; do \
	git mv `echo -n "$f " ; echo $f | sed -e 's;n\.;n/;'` \
done

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Phil White <pwhite@sgi.com>
[rjohnston@sgi.com reworked for TOT changes]
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

tests/xfs/036

@@ -35,8 +35,8 @@ status=1	# failure is the default!
 trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
 
 # get standard environment, filters and checks
-. ./common.rc
-. ./common.dump
+. ./common/rc
+. ./common/dump
 
 # link correct .out file
 _link_out_file $seq.out $seqfull.out