Fix broken cmake -DBUILD_CONFIG=mysql_release on Windows.

mysql_release.cmake set WITH_JEMALLOC=static, which makes windows
builds fail since there is no jemalloc either static or shared there

cmake/build_configurations/mysql_release.cmake

@@ -83,7 +83,8 @@ IF(FEATURE_SET)
 ENDIF()
 
 OPTION(ENABLED_LOCAL_INFILE "" ON)
-IF(RPM)
+IF(WIN32)
+ELSEIF(RPM)
   SET(WITH_SSL system CACHE STRING "")
   SET(WITH_ZLIB system CACHE STRING "")
 ELSEIF(DEB)