cmake: pass CMAKE_BUILD_TYPE into src.rpm

and don't pass BUILD_CONFIG twice, once is enough.

cmake/cpack_rpm.cmake

@@ -282,7 +282,6 @@ IF(CMAKE_VERSION VERSION_GREATER "3.9.99")
 
 SET(CPACK_SOURCE_GENERATOR "RPM")
 SETA(CPACK_RPM_SOURCE_PKG_BUILD_PARAMS
-  "-DBUILD_CONFIG=mysql_release"
   "-DRPM=${RPM}"
   "-DCPACK_RPM_BUILD_SOURCE_DIRS_PREFIX=/usr/src/debug/${CPACK_RPM_PACKAGE_NAME}-${VERSION}"
   )
@@ -293,6 +292,7 @@ MACRO(ADDIF var)
   ENDIF()
 ENDMACRO()
 
+ADDIF(CMAKE_BUILD_TYPE)
 ADDIF(BUILD_CONFIG)
 ADDIF(WITH_SSL)