build: Move wrapped scripts in "bin" directory Those scripts are used both in the build process and for the tests, so it seems clearer to not hide them in "t/wrap" directory. * t/wrap/aclocal.in: Rename to ... * bin/wrap-aclocal.in: ... this. * t/wrap/automake.in: Rename to ... * bin/wrap-automake.in: ... this. * configure.ac: Generate "bin/aclocal-${APIVERSION}" and "bin/automake-${APIVERSION}" at configure time. * t/Makefile.inc (nodist_noinst_SCRIPTS): Move wrapped scripts ... * bin/Makefile.inc (nodist_noinst_SCRIPTS): ... here. * Makefile.am (extend_PATH): Use "bin" directory. * t/ax/test-defs.in (am_bindir): Likewise. * t/get-sysconf.sh: Likewise. * .gitignore: Update.