riscv(support,linux): make mremap() non-moving due to VA space woes

Author: infiWang

src/lj_alloc.c

@@ -365,7 +365,7 @@ static void *CALL_MREMAP_(void *ptr, size_t osz, size_t nsz, int flags)
 #define CALL_MREMAP(addr, osz, nsz, mv) CALL_MREMAP_((addr), (osz), (nsz), (mv))
 #define CALL_MREMAP_NOMOVE	0
 #define CALL_MREMAP_MAYMOVE	1
-#if LJ_64 && (!LJ_GC64 || LJ_TARGET_ARM64)
+#if LJ_64 && (!LJ_GC64 || LJ_TARGET_ARM64 || LJ_TARGET_RISCV64)
 #define CALL_MREMAP_MV		CALL_MREMAP_NOMOVE
 #else
 #define CALL_MREMAP_MV		CALL_MREMAP_MAYMOVE