syscalls testsuite: use different escape sequence

The syscall testsuite uses embedded "// TEXT" markers in the .c files
to designate expected output, kind of like the "dg-" bunch in the gcc
test suite.  Unfortunately, "//" is not a unique prefix to systemtap
tests, and in particular it can occur in the system headers that will
be picked up with the "gcc -E -C ..." invocation in test.tcl.

So let's switch to "//staptest//".  test.tcl is also modified to
escape a few more mischevious regexp metacharacters that might sneak
past.

1 files changed, 12 insertions, 12 deletions

diff --git a/testsuite/systemtap.syscall/dir.c b/testsuite/systemtap.syscall/dir.c
index 5de4ce35..3eda8175 100644
--- a/testsuite/systemtap.syscall/dir.c
+++ b/testsuite/systemtap.syscall/dir.c
@@ -11,43 +11,43 @@ int main()
   int fd;
 
   mkdir("foobar", 0765);
-  // mkdir ("foobar", 0765) =
+  //staptest// mkdir ("foobar", 0765) =
 
   chdir("foobar");
-  // chdir ("foobar") = 0
+  //staptest// chdir ("foobar") = 0
 
   chdir("..");
-  // chdir ("..") = 0
+  //staptest// chdir ("..") = 0
 
   fd = open("foobar", O_RDONLY);
-  // open ("foobar", O_RDONLY) = NNNN
+  //staptest// open ("foobar", O_RDONLY) = NNNN
 
   fchdir(fd);
-  // fchdir (NNNN) = 0
+  //staptest// fchdir (NNNN) = 0
 
   chdir("..");
-  // chdir ("..") = 0
+  //staptest// chdir ("..") = 0
 
   close(fd);
-  // close (NNNN) = 0
+  //staptest// close (NNNN) = 0
 
   rmdir("foobar");
-  // rmdir ("foobar") = 0
+  //staptest// rmdir ("foobar") = 0
 
   fd = open(".", O_RDONLY);
-  // open (".", O_RDONLY) = NNNN
+  //staptest// open (".", O_RDONLY) = NNNN
 
 #ifdef SYS_mkdirat
   mkdirat(fd, "xyzzy", 0765);
-  // mkdirat (NNNN, "xyzzy", 0765) = 0
+  //staptest// mkdirat (NNNN, "xyzzy", 0765) = 0
 
 #endif
 
   close(fd);
-  // close (NNNN) = 0
+  //staptest// close (NNNN) = 0
 
   rmdir("xyzzy");
-  // rmdir ("xyzzy") =
+  //staptest// rmdir ("xyzzy") =
 
   return 0;
 }