Enhance the Win32 VFS I/O retry logic.

FossilOrigin-Name: 4760504396bcf44528eb8de9ed7aa5d9659c54b6

diff --cc manifest
index c958eec0315e2ccb2539c0d570d0af2c9ab2c5a2,ea2bfbfd15e2e4b962d54abf443700bc9e491f51..44f5a64a123c11a809dd8cc1ce421e5f2d2af028
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sa\sbroken\stest\scase\sin\sfuzz.test.
- D 2014-05-02T14:54:56.266
 -C Merge\supdates\sfrom\strunk.
 -D 2014-05-02T21:42:31.690
++C Enhance\sthe\sWin32\sVFS\sI/O\sretry\slogic.
++D 2014-05-02T22:39:54.345
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1166,7 -1166,7 +1166,7 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
- P 3bc43594aaeee9225c0590677fcce480bedcb37b
- R cb5319eb84ea1cdb4a55d1e33cf3d763
- U dan
- Z 412ddec016208716851032f358e0939e
 -P ed0bfcfadc07507a38f2c2387d85515ba1eb2722 faa469355eabb2c407f24638b090725448aac37f
++P faa469355eabb2c407f24638b090725448aac37f 598a3875ce98015e9a38db54bd0cb6290424c3d8
+ R ea09ee65f031a4f810c7f319ecf812cc
+ U mistachkin
 -Z 013a05de9aa8b3332c40bebaae0b4882
++Z f9afa829a6179e568b33b0a29e5a3328

diff --cc manifest.uuid
index 52fb89ae5776356d9c3246a99959cc7befabd5da,be274b35fe05b5d11a1e368a1a583ac46174d900..fea2bea1a8418c8f2e89c8be4d736679c881388c
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- faa469355eabb2c407f24638b090725448aac37f
 -598a3875ce98015e9a38db54bd0cb6290424c3d8
++4760504396bcf44528eb8de9ed7aa5d9659c54b6