tar: Move automake and autoreconf to build_prerequires

Since tar itself is a requires for the autotools we need to break
the dependency cycle at some point.

app-arch/tar/tar-1.26.recipe

@@ -14,7 +14,7 @@ DESCRIPTION="
 HOMEPAGE="http://www.gnu.org/software/tar/" 
 SRC_URI="http://ftp.gnu.org/gnu/tar/tar-1.26.tar.bz2"
 CHECKSUM_MD5="2cee42a2ff4f1cd4f9298eeeb2264519"
-REVISION="3"
+REVISION="4"
 ARCHITECTURES="x86_gcc2 ?x86"
 
 PROVIDES="
@@ -25,12 +25,12 @@ REQUIRES="
 	haiku >= $haikuVersion
 	"
 BUILD_REQUIRES="
-	cmd:automake >= 1.11
-	cmd:autoreconf >= 2.68
 	cmd:sed
 	"
 BUILD_PREREQUIRES="
 	haiku_devel >= $haikuVersion
+	cmd:automake
+	cmd:autoreconf
 	cmd:gcc
 	cmd:ld
 	cmd:make