bookmarks: directly use base dict 'setitem'
The bmstore '__setitem__' method is setting an extra flag that is not needed
during initialization. Skipping the method will allow further cleanup and yield
some speedup as a side effect.
Before:
! wall 0.009120 comb 0.010000 user 0.010000 sys 0.000000 (best of 312)
After:
! wall 0.007874 comb 0.010000 user 0.010000 sys 0.000000 (best of 360)
#require symlink
https://bz.mercurial-scm.org/1438
$ hg init
$ ln -s foo link
$ hg add link
$ hg ci -mbad link
$ hg rm link
$ hg ci -mok
$ hg diff -g -r 0:1 > bad.patch
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg import --no-commit bad.patch
applying bad.patch
$ hg status
R link
? bad.patch