Merge remote-tracking branch 'qatar/master'

* qatar/master:
  configure: clang: explicitly state dep file and rule name in DEPFLAGS

Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -3106,7 +3106,7 @@ probe_cc(){
     elif $_cc -v 2>&1 | grep -q clang; then
         _type=clang
         _ident=$($_cc --version | head -n1)
-        _depflags='-MMD'
+        _depflags='-MMD -MF $(@:.o=.d) -MT $@'
         _cflags_speed='-O3'
         _cflags_size='-Os'
     elif $_cc -V 2>&1 | grep -q Sun; then