MDEV-30694: Cross building on x86_64 to arch i686 fails

Currently cross compilation on x86_64 to arch i686 fails
with error:

> ctype-uca1400data.h
/bin/sh: 1: uca-dump: not found

Commit makes sure that uca-dump is treated correctly
when cross compiling MariaDB to another architecture

Author: helmutg

CMakeLists.txt

@@ -483,7 +483,7 @@ ADD_SUBDIRECTORY(support-files)
 ADD_SUBDIRECTORY(extra/aws_sdk)
 
 IF(NOT CMAKE_CROSSCOMPILING OR DEFINED CMAKE_CROSSCOMPILING_EMULATOR)
-  SET(EXPORTED comp_err comp_sql factorial)
+  SET(EXPORTED comp_err comp_sql factorial uca-dump)
   IF(NOT WITHOUT_SERVER)
     SET(EXPORTED ${EXPORTED} gen_lex_hash gen_lex_token)
   ENDIF()

strings/CMakeLists.txt

@@ -41,7 +41,9 @@ ADD_EXECUTABLE(conf_to_src EXCLUDE_FROM_ALL conf_to_src.c)
 SET_TARGET_PROPERTIES(conf_to_src PROPERTIES EXCLUDE_FROM_DEFAULT_BUILD TRUE)
 TARGET_LINK_LIBRARIES(conf_to_src mysys strings)
 
-ADD_EXECUTABLE(uca-dump uca-dump.c)
+IF(NOT CMAKE_CROSSCOMPILING OR DEFINED CMAKE_CROSSCOMPILING_EMULATOR)
+  ADD_EXECUTABLE(uca-dump uca-dump.c)
+ENDIF()
 
 ADD_CUSTOM_COMMAND(
   OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/ctype-uca1400data.h