Allow Ubuntu 12.04 packages to build on any architecture

Updating control file per suggestion in #258
diff --git a/contrib/packages/deb/ubuntu-precise/debian/control b/contrib/packages/deb/ubuntu-precise/debian/control
index c69dc2a..9e1a09a 100644
--- a/contrib/packages/deb/ubuntu-precise/debian/control
+++ b/contrib/packages/deb/ubuntu-precise/debian/control
@@ -7,7 +7,7 @@
 Homepage: http://www.tigervnc.com
 
 Package: tigervncserver
-Architecture: amd64 i386
+Architecture: any
 Provides: xserver, vnc-server
 Depends: x11-common | xserver-common, x11-utils, xauth, libbz2-1.0, libc6, libfontenc1, libfreetype6, libgcc1, libgl1-mesa-dri, libgnutls28, libjpeg-turbo8, libp11-kit0, libpam0g, libpixman-1-0, libstdc++6, libtasn1-3, libx11-6, libxau6, libxcb1, libxdmcp6, libxext6, libxfont1, libxtst6, zlib1g, libglu1-mesa, libxcursor1, libxinerama1, libxfixes3
 Recommends: xfonts-base, x11-xserver-utils
@@ -28,7 +28,7 @@
  JPEG codec.
 
 Package: xtigervncviewer
-Architecture: amd64 i386
+Architecture: any
 Provides: vncviewer, vnc-viewer
 Depends: libc6, libexpat1, libfontconfig1, libfreetype6, libgcc1, libgnutls28, libjpeg-turbo8, libp11-kit0, libpng12-0, libstdc++6, libtasn1-3, libx11-6, libxau6, libxcb1, libxdmcp6, libxext6, libxft2, libxrender1, zlib1g, libglu1-mesa
 Recommends: xfonts-base