Fix syscall testsuite bugs.

* testsuite/systemtap.syscall/test.tcl: Substitute '[[[[' and ']]]]' for
  '(' and ')'.  This allows us to get unquoted parens.
* testsuite/systemtap.syscall/test-debug.tcl: Matches substitute logic of
  test.tcl.
* testsuite/systemtap.syscall/README: Document '[[[[' and ']]]]'.
* testsuite/systemtap.syscall/chmod.c: Handle optional O_LARGEFILE flag in
  open calls.
* testsuite/systemtap.syscall/dir.c: Ditto.
* testsuite/systemtap.syscall/mmap.c: Ditto.
* testsuite/systemtap.syscall/openclose.c: Ditto.
* testsuite/systemtap.syscall/readwrite.c: Ditto.
* testsuite/systemtap.syscall/stat.c: Ditto.

1 files changed, 2 insertions, 2 deletions

diff --git a/testsuite/systemtap.syscall/dir.c b/testsuite/systemtap.syscall/dir.c
index 3eda8175..f5b9f320 100644
--- a/testsuite/systemtap.syscall/dir.c
+++ b/testsuite/systemtap.syscall/dir.c
@@ -20,7 +20,7 @@ int main()
   //staptest// chdir ("..") = 0
 
   fd = open("foobar", O_RDONLY);
-  //staptest// open ("foobar", O_RDONLY) = NNNN
+  //staptest// open ("foobar", O_RDONLY[[[[.O_LARGEFILE]]]]?) = NNNN
 
   fchdir(fd);
   //staptest// fchdir (NNNN) = 0
@@ -35,7 +35,7 @@ int main()
   //staptest// rmdir ("foobar") = 0
 
   fd = open(".", O_RDONLY);
-  //staptest// open (".", O_RDONLY) = NNNN
+  //staptest// open (".", O_RDONLY[[[[.O_LARGEFILE]]]]?) = NNNN
 
 #ifdef SYS_mkdirat
   mkdirat(fd, "xyzzy", 0765);