Use MariaDB as the project name in CMakeLists.txt (fix)

Partial revert of d29d9157.

It seems from CI that lower case RPM names are generated without
explictly setting the package name to mixed case.

CMakeLists.txt

@@ -88,6 +88,8 @@ ELSE()
   SET(CMAKE_CXX_STANDARD 11)
 ENDIF()
 
+# Lower case package names from PROJECT are used if not explictly upper case.
+SET(CPACK_PACKAGE_NAME "MariaDB")
 SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "MariaDB: a very fast and robust SQL database server")
 SET(CPACK_PACKAGE_URL "http://mariadb.org")
 

cmake/cpack_rpm.cmake

@@ -34,6 +34,7 @@ SET(CPACK_COMPONENTS_ALL Server ManPagesServer IniFiles Server_Scripts
                          backup
 )
 
+SET(CPACK_RPM_PACKAGE_NAME ${CPACK_PACKAGE_NAME})
 SET(CPACK_RPM_PACKAGE_VERSION ${CPACK_PACKAGE_VERSION})
 IF(CMAKE_VERSION VERSION_LESS "3.6.0")
   SET(CPACK_PACKAGE_FILE_NAME "${CPACK_RPM_PACKAGE_NAME}-${SERVER_VERSION}-${RPM}-${CMAKE_SYSTEM_PROCESSOR}")