scripts/wrapper: fix wrong test when checking access to the reall tool

In C, the proper syntax for a bit-wise OR is a single '|', not two.

It worked so far because all was well:
- X_OK == 1
- R_OK||X_OK == 1
- the file we searched for had the x-bit set
-> access( file, R_OK||X_OK ) worked
- inicidentally, the file we searched for also had the r-bit set,
  but we were not testing that in fact.

scripts/wrapper.c

@@ -71,7 +71,7 @@ int main( int argc,
       if( stat( testname, &st ) == 0 ) {
         /* OK, exists. Is it a regular file, or a
          * symlink, which the current user may execute? */
-        if( S_ISREG( st.st_mode ) && ! access( testname, X_OK || R_OK ) ) {
+        if( S_ISREG( st.st_mode ) && ! access( testname, X_OK | R_OK ) ) {
           fullname = strdup( testname );
           break;
         }