Comment out the "Building in the srcdir is not supported!" test/warning.

This is no longer needed, since the classic build system is dead.  The
original purpose of this test was for the autoconf build not to clobber the
classic makefiles and them someone checkin them in by mistake.  No longer a
problem.

configure.in

@@ -32,11 +32,11 @@ dnl Set this define to make fixes w/o breaking anything else
 AC_DEFINE(USE_AUTOCONF)
 AC_DEFINE(MOZILLA_CLIENT)
 
-d=`pwd`
-if [ test "${srcdir}" = "${d}" || test "${srcdir}" = "." ]; then
-    AC_ERROR(Building in the srcdir is not supported! Please build from a separate objdir.)
-fi
-unset d
+dnl d=`pwd`
+dnl if [ test "${srcdir}" = "${d}" || test "${srcdir}" = "." ]; then
+dnl     AC_ERROR(Building in the srcdir is not supported! Please build from a separate objdir.)
+dnl fi
+dnl unset d
 
 dnl Set the version number of the libs included with mozilla
 dnl ========================================================