Small fixes in CMake:

 create data dir correctly in initial_database target on Windows
 handle case where INSTALL_MYSQLTESTDIR is empty (e.g someone does not want
 to install tests)

mysql-test/CMakeLists.txt

@@ -13,6 +13,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 
+IF(INSTALL_MYSQLTESTDIR)
 INSTALL(
  DIRECTORY .
  DESTINATION ${INSTALL_MYSQLTESTDIR}
@@ -28,6 +29,7 @@ INSTALL(
  PATTERN "*.am" EXCLUDE
  PATTERN "*.in" EXCLUDE
 )
+ENDIF()
 
 
 
@@ -48,9 +50,11 @@ IF(UNIX)
    ./mysql-test-run.pl mysql-test-run
   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
   ) 
+  IF(INSTALL_MYSQLTESTDIR)
     INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/mtr 
       ${CMAKE_CURRENT_BINARY_DIR}/mysql-test-run 
       DESTINATION ${INSTALL_MYSQLTESTDIR})
+  ENDIF()
 ENDIF()
 
 IF(CMAKE_GENERATOR MATCHES "Visual Studio")

sql/CMakeLists.txt

@@ -271,8 +271,7 @@ IF(WIN32 AND MYSQLD_EXECUTABLE)
      COMMAND ${CMAKE_COMMAND}
      ${CONFIG_PARAM} -P ${CMAKE_CURRENT_BINARY_DIR}/create_initial_db.cmake
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/data
-     COMMAND  ${CMAKE_COMMAND} -E touch initdb.dep
-     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+     COMMAND  ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/initdb.dep
      DEPENDS mysqld
   )
   ADD_CUSTOM_TARGET(initial_database