fix: use '-module -avoid-version' when compiling TCL packages

fix: use '-module -avoid-version' when compiling TCL packages

Quoting from #1285:

  They are runtime loadable (dlopen, or equivalent, from tcl program, via
  'load') rather than shared libraries for dynamic linking by others. On OS X,
  these two concepts have different extensions (.so vs .dylib). It's confusing
  when a runtime-loadable module has a dynamic-linker extension. In commit
  40123aedcd2761e98d8c9917be6040ea6187c97f, the -module flag was added to
  LDFLAGS in tclpkg/gv/Makefile.am, which fixes libgv_tcl.
  Could the same change be applied to the other tclpkg/*/Makefile.am LDFLAGS?

Gitlab: fixes #1285
Suggested-by: Daniel Macks