riscv: Add missing relocation intrinsics for __fixdfsi/__ltdf2 (#3733)

Author: no1wudi

core/iwasm/aot/arch/aot_reloc_riscv.c

@@ -134,6 +134,7 @@ static SymbolMap target_sym_map[] = {
     REG_SYM(__eqdf2),
     REG_SYM(__extendsfdf2),
     REG_SYM(__fixdfdi),
+    REG_SYM(__fixdfsi),
     REG_SYM(__fixunsdfdi),
     REG_SYM(__fixunsdfsi),
     REG_SYM(__floatdidf),
@@ -143,6 +144,7 @@ static SymbolMap target_sym_map[] = {
     REG_SYM(__gedf2),
     REG_SYM(__gtdf2),
     REG_SYM(__ledf2),
+    REG_SYM(__ltdf2),
     REG_SYM(__muldf3),
     REG_SYM(__nedf2),
     REG_SYM(__negdf2),