Linking failed on Debian based linux.

[nanfang2000]

The linker failed to find the reference functions in the libraries.
I fixed it by putting the LDFLAG to after the Objects.
$(CC) $(REAL_CFLAGS) $(OBJECTS) $(REAL_LDFLAGS) -o out/flutter-pi

A doc just explained this issue:
https://stackoverflow.com/a/43305704/388520

[ardera]

Okay, thanks, I'll fix that in the Makefile.