vim: don't override CFLAGS/LDFLAGS after configuration.

vim does not support building with -D_FORTIFY_SOURCE=2 (and in fact
crashes immediately when doing do).  vim's configure detects this
and rewrites it into -D_FORTIFY_SOURCE=1, which is then used
subsequently.  We therefore use the rewritten flags and do not
override them again.

srcpkgs/vim/template

@@ -3,7 +3,7 @@ pkgname=vim
 _distver=7.4
 _patchver=682
 version=${_distver}.${_patchver}
-revision=1
+revision=2
 hostmakedepends="mercurial pkg-config"
 makedepends="ncurses-devel acl-devel libXt-devel gtk+-devel perl>=5.20.2
  ruby-devel>=2.2 python-devel lua-devel"
@@ -78,7 +78,7 @@ do_build() {
 
 	for f in ${subpackages/vim-common/}; do
 		cd $wrksrc/$f
-		make CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" ${makejobs}
+		make ${makejobs}
 	done
 
 }