A join patch for MCOL-4527 (a performance hack) and MCOL-4539 (a bug fix)

- MCOL-4527 Simple query performace is degraded between 5.4 and 5.5

  xxx_nopad_bin collations are now around 30% faster on simple queries like:

    SELECT * FROM t1 WHERE short_char_column_nopad_bin = 'literal'

  The gain is achieved by comparing two short CHAR values as uint64_t.

  Note, this patch does not affect xxx_bin collations!
  It wouldn't be correct to apply the same improvement for xxx_bin
  collations (i.e. with PAD SPACE attribute), because it would change
  the way how trailing spaces are compared.

- MCOL-4539 WHERE short_char_column='literal' ignores the collation on a huge table

  Only the first thread used a correct collation when performing:
    WHERE short_char_char='literal'
  Other (15) threads used the server default collation, because
  the charsetNumber attribute was not copyed during cloning.

- This patch also adds mtr/basic/suite.opt, so "mtr" can run without --extern.

primitives/linux-port/column.cpp

@@ -707,6 +707,11 @@ inline bool colCompare(int64_t val1, int64_t val2, uint8_t COP, uint8_t rf,
     {
         if (!regex.used && !rf)
         {
+            // A temporary hack for xxx_nopad_bin collations
+            // TODO: MCOL-4534 Improve comparison performance in 8bit nopad_bin collations
+            if ((typeHolder.getCharset().state & (MY_CS_BINSORT|MY_CS_NOPAD)) ==
+                (MY_CS_BINSORT|MY_CS_NOPAD))
+              return colCompare_(order_swap(val1), order_swap(val2), COP);
             utils::ConstString s1 = {reinterpret_cast<const char*>(&val1), 8};
             utils::ConstString s2 = {reinterpret_cast<const char*>(&val2), 8};
             return colCompareStr(typeHolder, COP, s1.rtrimZero(), s2.rtrimZero());