msi: Don't fail if the directory already exists in MsiCreateAndVerifyInstallerDirectory.
[wine] / dlls / olesvr32 /
drwxr-xr-x   ..
-rw-r--r-- 91 Makefile.in
-rw-r--r-- 417 olesvr32.spec
-rw-r--r-- 6073 olesvr_main.c