autogen.sh: fix errors with new autotools.
The following errors occurred when running ./autogen.sh : $ ./autogen.sh + aclocal configure.ac:18: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:386: AC_USE_SYSTEM_EXTENSIONS is expanded from... ../../lib/autoconf/specific.m4:332: AC_GNU_SOURCE is expanded from... configure.ac:18: the top level configure.ac:18: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS configure.ac:19: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:459: AC_MINIX is expanded from... configure.ac:19: the top level configure.ac:19: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS and so on for autoheader and friends. According to the autotools docs, the proper way to handle this is to just call AC_USE_SYSTEM_EXTENSIONS. Michael
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				@ -14,9 +14,7 @@ AH_TEMPLATE([TARGET_SYSTEM],
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AC_DEFINE_UNQUOTED(TARGET_SYSTEM, ["$target"])
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					AC_DEFINE_UNQUOTED(TARGET_SYSTEM, ["$target"])
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dnl Check if we're compiling on a weird platform :)
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					dnl Check if we're compiling on a weird platform :)
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AC_AIX
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					AC_USE_SYSTEM_EXTENSIONS
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AC_GNU_SOURCE
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AC_MINIX
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dnl
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					dnl
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dnl Command line options
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					dnl Command line options
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