fix warnings from autoreconf
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upuaut
configure.ac:5: warning: AC_ARG_PROGRAM was called before AC_CANONICAL_TARGET
../../lib/autoconf/general.m4:1834: AC_CANONICAL_TARGET is expanded from...
configure.ac:5: the top level
configure.ac:184: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
acinclude.m4:1289: BEECRYPT_THREAD_LOCAL_STORAGE is expanded from...
configure.ac:184: the top level
fix warnings from autoreconf