Enable luajit ffi

Also fixes a crash where jit module present but not ffi would cause
filesystem require code to be called too early

Author: p-sam

build.sh

@@ -34,7 +34,7 @@ mkdir -p "$BUILD_DIR/luajit"
 cp -auf "$ROOT_DIR/repo/luajit/." "$BUILD_DIR/luajit"
 make -C "$BUILD_DIR/luajit/src" -j$JOBS libluajit.a \
 	CROSS="$TOOL_PREFIX" CFLAGS="" LDFLAGS="" LIBS="" TARGET_SYS="SWITCH" BUILDMODE="static" \
-	XCFLAGS="-DLJ_TARGET_CONSOLE=1 -DLUAJIT_DISABLE_JIT -DLUAJIT_DISABLE_FFI -DLUAJIT_USE_SYSMALLOC" \
+	XCFLAGS="-DLJ_TARGET_CONSOLE=1 -DLUAJIT_DISABLE_JIT -DLUAJIT_USE_SYSMALLOC" \
 	TARGET_CFLAGS="$CFLAGS" TARGET_LDFLAGS="$LDFLAGS" TARGET_LIBS="$LIBS"
 
 echo "** LÖVE **"