autoconf: Break cyclic dependency

There is no reason why autoconf would need autoconf and thus have a
cyclic dependency, as there is no need to call autoreconf as no files
are changed that result in generated files.

It seems the BUILD_PREREQUIRES only included autoconf as a hack to
include perl, awk, m4 and others needed to build autoreconf.

sys-devel/autoconf/autoconf-2.69.recipe

@@ -16,7 +16,7 @@ CHECKSUM_SIZE="1927468"
 CHECKSUM_MD5="82d05e03b93e45f5a39b828dc9c6c29b"
 CHECKSUM_RMD160="7b7d711535827826f32f5847095233e1e9925a29"
 CHECKSUM_SHA512="e34c7818bcde14d2cb13cdd293ed17d70740d4d1fd7c67a07b415491ef85d42f450d4fe5f8f80cc330bf75c40a62774c51a4336e06e8da07a4cbc49922d975ee"
-REVISION="5"
+REVISION="6"
 ARCHITECTURES="x86_gcc2 x86 x86_64"
 
 PATCHES='autoconf-2.69.patchset'
@@ -44,10 +44,11 @@ BUILD_REQUIRES="
 	"
 BUILD_PREREQUIRES="
 	haiku_devel >= $haikuVersion
-	cmd:automake >= 1.13.1
-	cmd:autoreconf >= 2.60
+	cmd:awk
+	cmd:m4
 	cmd:make
 	cmd:makeinfo
+	cmd:perl
 	cmd:sed
 	"
 
@@ -55,8 +56,6 @@ BUILD_PACKAGE_ACTIVATION_PHASE=INSTALL
 
 BUILD()
 {
-	autoreconf
-
 	# make sure that the build system doesn't try to update the manpages,
 	# as that requires help2man, which isn't available
 	touch man/*.1