fix: recompile with fPIC for libgrand-search-daemon

Fix build on 64bit arch

Log: The compiler may report an error and exit, the error is like this:
 /usr/lib64/gcc/aarch64-suse-linux/13/../../../../aarch64-suse-linux/bin/ld: /tmp/ccNUyrNk.ltrans0.ltrans.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `db_list_insert_node' which may bind externally can not be used when making a shared object; recompile with -fPIC

src/libgrand-search-daemon/CMakeLists.txt

@@ -5,7 +5,7 @@ set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIE -pie")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIE -pie -fPIC")
 
 # 设置库名
 set(LIB_NAME ${DAEMON_LIB_NAME})