If we fail to find python or qmtest, give a warning message instead of an
error message.  This should hopefully allow our nightly tester to run, which
does not run the QMTest tests at present.

llvm-svn: 8691
diff --git a/llvm/autoconf/configure.ac b/llvm/autoconf/configure.ac
index 1c965c2..07986ed 100644
--- a/llvm/autoconf/configure.ac
+++ b/llvm/autoconf/configure.ac
@@ -356,13 +356,13 @@
 AC_PATH_PROG(PYTHON,[python],[false])
 if test ${PYTHON} = "false"
 then
-	AC_MSG_ERROR([python required but not found])
+	AC_MSG_WARN([python required but not found])
 fi
 
 AC_PATH_PROG(QMTEST,[qmtest],[false])
 if test ${QMTEST} = "false"
 then
-	AC_MSG_ERROR([qmtest required but not found])
+	AC_MSG_WARN([qmtest required but not found])
 fi
 
 dnl Verify that the version of python available is high enough for qmtest