Bug#45793 macce charset causes error with IBMDB2I

Creating an IBMDB2I table with the macce character set
is successful, but any attempt to insert data into the
table was failing.

This was happening because the character set name "macce"
is not a valid iconv descriptor for IBM i PASE. This patch
adds an override to convertTextDesc to use the equivalent
valid iconv descriptor "IBM-1282" instead.

mysql-test/suite/ibmdb2i/r/ibmdb2i_bug_45793.result

+drop table if exists t1;
+create table t1 (c char(10), index(c)) charset macce engine=ibmdb2i;
+insert into t1 values ("test");
+select * from t1 order by c;
+c
+test
+drop table t1;

mysql-test/suite/ibmdb2i/t/ibmdb2i_bug_45793.test

+source suite/ibmdb2i/include/have_ibmdb2i.inc;
+source suite/ibmdb2i/include/have_i61.inc;
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+
+create table t1 (c char(10), index(c)) charset macce engine=ibmdb2i;
+insert into t1 values ("test");
+select * from t1 order by c;
+drop table t1;

storage/ibmdb2i/db2i_charsetSupport.cc

@@ -384,6 +384,11 @@ static int32 convertTextDesc(const int32 inType, const int32 outType, const char
         strcpy(outDesc,"IBM-1256");
         DBUG_RETURN(0);
       }
+      else if (strcmp("macce", inDescOverride) == 0)
+      {
+        strcpy(outDesc,"IBM-1282");
+        DBUG_RETURN(0);
+      }
     }
     else if (outType == Qlg_TypeAS400CCSID)
     {