dbus: remove build host test in configure script

The dbus build tests the build host to detect what initscript
environment it expects.  Remove the test and set it to "redhat"
unconditionally as the oe-core initscript has a redhat-style pid file
path.

Signed-off-by: Andy Ross <andy.ross@windriver.com>
Upstream-Status: Inappropriate [embedded]

diff -u a/configure.ac b/configure.ac
--- a/configure.ac	2012-08-28 11:23:43.040609874 -0700
+++ b/configure.ac	2012-08-28 11:54:25.602913945 -0700
@@ -1348,19 +1348,8 @@
 AS_AC_EXPAND(EXPANDED_LIBEXECDIR, "$libexecdir")
 AS_AC_EXPAND(EXPANDED_DATADIR, "$datadir")
 
-#### Check our operating system
-operating_system=unknown
-if test -f /etc/redhat-release || test -f $EXPANDED_SYSCONFDIR/redhat-release ; then
-   operating_system=redhat
-fi
-
-if test -f /etc/slackware-version || test -f $EXPANDED_SYSCONFDIR/slackware-version ; then
-   operating_system=slackware
-fi
-
-if test -f /usr/bin/cygwin1.dll || test -f $EXPANDED_BINDIR/cygwin1.dll ; then
-   operating_system=cygwin
-fi
+#### Build host test removed from upstream code, openembedded initscript is redhat-like:
+operating_system=redhat
 
 #### Sort out init scripts