Added libarchive .bep file by disreali with some minor changes.

app-arch/libarchive/libarchive-2.8.3.bep

@@ -0,0 +1,26 @@
+DESCRIPTION="C library and command-line tools for reading and writing tar, cpio, zip, ISO, and other archive formats." 
+HOMEPAGE="http://code.google.com/p/libarchive/" 
+SRC_URI="http://libarchive.googlecode.com/files/libarchive-2.8.3.zip"
+REVISION="1"
+STATUS_HAIKU="stable"
+DEPEND=""
+CHECKSUM_MD5="e4fb38b224f623e1cf1122631bf35b82"
+BUILD {
+	cd libarchive-2.8.3
+	libtoolize --force --copy --install
+	aclocal -I build/autoconf
+	autoconf
+	automake
+	chmod 755 configure
+	./configure --prefix=`finddir B_COMMON_DIRECTORY`
+	make
+	#make check
+}
+
+INSTALL {
+	cd libarchive-2.8.3
+	make install
+}
+
+LICENSE="BSD (2-clause)"
+COPYRIGHT="2003-2009 Tim Kientzle"