Mark aarch64 as a 64-bit architecture.
Otherwise, "/usr/lib" would be used instead of correct "/usr/lib64".

--- mysql-connector-odbc-5.3.9-src/CMakeLists.txt	2017-07-18 06:52:28.000000000 +0200
+++ mysql-connector-odbc-5.3.9-src/CMakeLists.txt_patched	2018-01-02 20:38:52.032637173 +0100
@@ -251,7 +251,7 @@ SET(EXECUTABLE_OUTPUT_PATH "${CMAKE_BINA
 SET(LIBRARY_OUTPUT_PATH "${CMAKE_BINARY_DIR}/lib")
 
 SET(LIB_SUBDIR "lib")
-IF(RPM_BUILD AND CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64|ppc64|ppc64p7|s390x|sparc64)") 
+IF(RPM_BUILD AND CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64|ppc64|ppc64p7|s390x|sparc64|aarch64)")
   SET(LIB_SUBDIR "lib64")
 ENDIF()