MDEV-21108 Add option for setting install paths of groonga

Include gronnga and groonga-normalizer-mysql install path

storage/mroonga/vendor/groonga/CMakeLists.txt

@@ -86,7 +86,9 @@ set(LIB_DIR "lib")
 set(INCLUDE_DIR "include")
 set(GRN_INCLUDE_DIR "include/groonga")
 set(DATA_DIR "share")
-set(GRN_DATA_DIR "${DATA_DIR}/${GRN_PROJECT_NAME}")
+if(NOT DEFINED GRN_DATA_DIR)
+    set(GRN_DATA_DIR "${DATA_DIR}/${GRN_PROJECT_NAME}")
+endif()
 set(CONFIG_DIR "etc")
 set(GRN_CONFIG_DIR "${CONFIG_DIR}/${GRN_PROJECT_NAME}")
 set(GRN_CONFIG_PATH "${CMAKE_INSTALL_PREFIX}/${GRN_CONFIG_DIR}/groonga.conf")

storage/mroonga/vendor/groonga/vendor/plugins/groonga-normalizer-mysql/CMakeLists.txt

@@ -16,7 +16,9 @@
 # MA 02110-1335  USA
 
 cmake_minimum_required(VERSION 2.6)
-set(GROONGA_NORMALIZER_MYSQL_PROJECT_NAME "groonga-normalizer-mysql")
+if(NOT DEFINED GROONGA_NORMALIZER_MYSQL_PROJECT_NAME)
+    set(GROONGA_NORMALIZER_MYSQL_PROJECT_NAME "groonga-normalizer-mysql")
+endif()
 project("${GROONGA_NORMALIZER_MYSQL_PROJECT_NAME}")
 
 if(DEFINED GROONGA_NORMALIZER_MYSQL_EMBED)