workingctx: correctly compute the flag for noexec filesystems+merge
This bug happens if the filesystem doesn't support exec-bit, during merges,
for example in 24ed7a541f23 on the hg repo.
If f is not in p1, but is in p2 and has the x-bit in p2, since the dirstate is
based on p1, and the FS doesn't support the exec-bit, the dirstate can't
"guess" the right bit.
We instead fix it in workingcontext.flags()/manifest.
adding a
adding b
adding c
adding d
adding dir/bar/foo
adding dir/x
adding dir/y
adding e
updating to branch default
8 files updated, 0 files merged, 0 files removed, 0 files unresolved
M a
% inserve
% cannot start, already bound
abort: inotify-server: cannot start: socket is already bound
? hg.pid
% clean
C a
C b
C c
C d
C dir/bar/foo
C dir/x
C dir/y
C e
% all
? hg.pid
C a
C b
C c
C d
C dir/bar/foo
C dir/x
C dir/y
C e
% path patterns
M dir/x
? hg.pid
M dir/x
M x
% issue 1375
adding h/h
adding hg.pid
removing h/h
A h
R h/h
M a
merging a
1 files updated, 1 files merged, 2 files removed, 0 files unresolved
M a
3 files updated, 1 files merged, 0 files removed, 0 files unresolved
M a
adding 1844/foo