main/cmake: upgrade to 2.8.8

main/cmake/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=cmake
-pkgver=2.8.7
+pkgver=2.8.8
 pkgrel=0
 pkgdesc="CMake is a cross-platform open-source make system"
 url="http://www.cmake.org"
@@ -43,4 +43,4 @@ package() {
 	make DESTDIR="$pkgdir" install
 }
 
-md5sums="e1b237aeaed880f65dec9c20602452f6  cmake-2.8.7.tar.gz"
+md5sums="ba74b22c788a0c8547976b880cd02b17  cmake-2.8.8.tar.gz"