bug#36214: Linking problem with AC_LIB_HAVE_LINKFLAGS

[Roumen Petrov]

Bruno Haible wrote:
> [SNIP]
> Yes, such a libgnuastro.la file would be incorrect.
>
> Here's the way to make sure libgnuastro.la contains the right dependencies:
>    * For libraries that are provided by the same package:
>      libgnuastro_la_LDFLAGS = ... ../gsl/libgsl.la ...
foo_LIBADD vs foo_LDFLAGS

In above sample correct is first.
LDFLAGS is for flags like -module -no-undefined and etc.

Roumen