Add shortfile.at

tests/Makefile.am

@@ -99,6 +99,7 @@ TESTSUITE_AT = \
  rename03.at\
  same-order01.at\
  same-order02.at\
+ shortfile.at\
  shortrec.at\
  sparse01.at\
  sparse02.at\

tests/testsuite.at

@@ -179,6 +179,7 @@ m4_include([volume.at])
 m4_include([volsize.at])
 
 m4_include([comprec.at])
+m4_include([shortfile.at])
 
 m4_include([truncate.at])
 m4_include([grow.at])