cmake: upgrade to 2.8.4,use cmake compression libs

would not build without libarchive adding this flags avoids
dependancy on bzip2-devel and libarchive-devel

srcpkgs/cmake/template

@@ -1,18 +1,18 @@
 # Template file for 'cmake'
 pkgname=cmake
-version=2.8.2
-revision=1
+version=2.8.4
 distfiles="http://www.cmake.org/files/v2.8/$pkgname-$version.tar.gz"
 build_style=configure
 configure_script=./bootstrap
 configure_args="--prefix=/usr --mandir=/share/man
- --docdir=/share/doc/cmake --system-libs"
+ --docdir=/share/doc/cmake --system-libs --no-system-libarchive 
+ --no-system-bzip2"
 if [ -n "$XBPS_MAKEJOBS" ]; then
 	configure_args="$configure_args --parallel=$XBPS_MAKEJOBS"
 fi
 short_desc="Cross-platform, open-source build system"
 maintainer="Juan RP <xtraeme@gmail.com>"
-checksum=766ff169af798599d7dd42e41e9f4533d73942a2bb928235115412dce5b81406
+checksum=d97ea9f807f5407030d4f7246accc26addc520c9ee3897c4582eba3da49253cc
 long_desc="
  CMake is a cross-platform, open-source build system. CMake is a family
  of tools designed to build, test and package software. CMake is used