Dereference INTDIR in serf.mak.
Dereference INTDIR in serf.mak.

* serf.mak
  (ALL, INTDIR, CHECK, STATIC_LIB): Use $(INTDIR) instead of INTDIR.

Patch by dpb at corrigendum.ru.

stoneCC/serf,yesoce/serf,yesoce/serf,KyleSanderson/serf,zhupan/serf,soufianeEL/serf,alex1818/serf,SirJson/serf,soufianeEL/serf,x-clone/serf,KyleSanderson/serf,stoneCC/serf,alex1818/serf,soufianeEL/serf,yesoce/serf,google-code-export/serf,x-clone/serf,pengdu/serf,zhupan/serf,x-clone/serf,stoneCC/serf,lazysoez/serf,lazysoez/serf,google-code-export/serf,x-clone/serf,yesoce/serf,SirJson/serf,lazysoez/serf,alex1818/serf,pengdu/serf,zhengcq315/serf,zhengcq315/serf,zhupan/serf,pengdu/serf,pengdu/serf,SirJson/serf,zhupan/serf,zhengcq315/serf,KyleSanderson/serf,google-code-export/serf,google-code-export/serf,lazysoez/serf,alex1818/serf,KyleSanderson/serf,stoneCC/serf,SirJson/serf,zhengcq315/serf,soufianeEL/serf