To work with autoconf 2.73, tweak the macro ordering in configure.in.

Upstream-Status: Pending
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Index: libarchive-3.6.2/configure.ac
===================================================================
--- libarchive-3.6.2.orig/configure.ac
+++ libarchive-3.6.2/configure.ac
@@ -357,6 +357,19 @@ if test "x$with_bz2lib" != "xno"; then
   esac
 fi
 
+# Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+# la_TYPE_UID_T defaults to "int", which is incorrect for MinGW
+# and MSVC. Use a customized version.
+la_TYPE_UID_T
+AC_TYPE_MODE_T
+# AC_TYPE_OFF_T defaults to "long", which limits us to 4GB files on
+# most systems... default to "long long" instead.
+AC_CHECK_TYPE(off_t, [long long])
+AC_TYPE_SIZE_T
+AC_CHECK_TYPE(id_t, [unsigned long])
+AC_CHECK_TYPE(uintptr_t, [unsigned int])
+
 AC_ARG_WITH([libb2],
   AS_HELP_STRING([--without-libb2], [Don't build support for BLAKE2 through libb2]))
 
@@ -558,19 +571,6 @@ LDFLAGS=$save_LDFLAGS
 
 AC_SUBST(GC_SECTIONS)
 
-# Checks for typedefs, structures, and compiler characteristics.
-AC_C_CONST
-# la_TYPE_UID_T defaults to "int", which is incorrect for MinGW
-# and MSVC. Use a customized version.
-la_TYPE_UID_T
-AC_TYPE_MODE_T
-# AC_TYPE_OFF_T defaults to "long", which limits us to 4GB files on
-# most systems... default to "long long" instead.
-AC_CHECK_TYPE(off_t, [long long])
-AC_TYPE_SIZE_T
-AC_CHECK_TYPE(id_t, [unsigned long])
-AC_CHECK_TYPE(uintptr_t, [unsigned int])
-
 # Check for tm_gmtoff in struct tm
 AC_CHECK_MEMBERS([struct tm.tm_gmtoff, struct tm.__tm_gmtoff],,,
 [