test-convert-cvs: handle older cvs client

tests/test-convert-cvs

@@ -38,7 +38,8 b' echo % commit new file revisions'
 cd src
 echo a >> a
 echo c >> b/c
-cvs -q commit -mci1 . | sed -e 's:.*src/\(.*\),v:src/\1,v:g'
+cvs -q commit -mci1 . | grep '<--' |\
+    sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'
 cd ..
 
 echo % convert again

tests/test-convert-cvs.out

@@ -21,14 +21,8 b' updating tags'
 a
 c
 % commit new file revisions
-Checking in a;
-src/a,v  <--  a
-new revision: 1.2; previous revision: 1.1
-done
-Checking in b/c;
-src/b/c,v  <--  c
-new revision: 1.2; previous revision: 1.1
-done
+checking in src/a,v
+checking in src/b/c,v
 % convert again
 connecting to cvsrepo
 destination src-hg is a Mercurial repository