fileset: add helpers to make predicatematcher and nevermatcher
These functions will be used to compose a tree of matchers from a fileset
expression.
fixbundle() {
grep -v 'saving bundle' | grep -v 'saved backup' | \
grep -v added | grep -v adding | \
grep -v "unable to find 'e' for patching" | \
grep -v "e: No such file or directory" | \
cat
}