Remove NSIS installs when upgrading to 64-bit

The NSIS installer appears to have only ever existed as a 32-bit
software.  As such, unconditionally check the 32-bit registry tree
for an uninstall string; the architecture of the current package
being installed is not relevant to what was previously installed.

https://github.com/krb5/krb5/commit/4d3200ca369b47e8cf6966ae7670823d57ef2b3f
Author: Ben Kaduk <kaduk@mit.edu>
Commit: 4d3200ca369b47e8cf6966ae7670823d57ef2b3f
Branch: master
 src/windows/installer/wix/property.wxi |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)