Description of problem:
Postinstall script for shared-mime-info-0.19-5.el5 is umask dependent.
If umask is 077, then /usr/share/mime/{aliases,globs,magic} etc.
get 0600 permissions --> problems when regular users (for example evince
complains about unhandled mime types).

Version-Release number of selected component (if applicable):
shared-mime-info-0.19-5.el5

How reproducible:

Steps to Reproduce:
1. set root's umask to 077
2. run update-mime-database /usr/share/mime
3. (or update/install shared-mime-info).
  
Actual results:
# ls -la /usr/share/mime/{aliases,globs,magic}
-rw------- 1 root root  2419 Jul  2 13:50 /usr/share/mime/aliases
-rw------- 1 root root 13661 Jul  2 13:50 /usr/share/mime/globs
-rw------- 1 root root 11849 Jul  2 13:50 /usr/share/mime/magic

Expected results:
-rw-r--r-- 1 root root  2419 Jul  2 13:50 /usr/share/mime/aliases
-rw-r--r-- 1 root root 13661 Jul  2 13:50 /usr/share/mime/globs
-rw-r--r-- 1 root root 11849 Jul  2 13:50 /usr/share/mime/magic

Additional info:
shared-mime-info postinstall script (or update-mime-database program) should set
umask to 022 before updating files.