Fix bug in encoding conversion map.

src/backend/utils/mb/Unicode/euc_jp_to_utf8.map

-static pg_local_to_utf LUmapEUC_JP[ 13477 ] = {
+static pg_local_to_utf LUmapEUC_JP[] = {
   {0x8ea1, 0xefbda1},
   {0x8ea2, 0xefbda2},
   {0x8ea3, 0xefbda3},

src/backend/utils/mb/Unicode/gb18030_to_utf8.map

-static pg_local_to_utf LUmapGB18030[ 63490 ] = {
+static pg_local_to_utf LUmapGB18030[] = {
   {0x0000, 0x0000},
   {0x0001, 0x0001},
   {0x0002, 0x0002},

src/backend/utils/mb/Unicode/utf8_to_gb18030.map

-static pg_utf_to_local ULmapGB18030[ 63489 ] = {
+static pg_utf_to_local ULmapGB18030[] = {
   {0x0000, 0x0000},
   {0x0001, 0x0001},
   {0x0002, 0x0002},