Remove useless HOST_OS==windows check

The contents on both sides are the same.

Change-Id: I9d7be32d9911df4c68e14760a98afd86196771ce
diff --git a/mcld-host-build.mk b/mcld-host-build.mk
index ed9d582..9bfc958 100644
--- a/mcld-host-build.mk
+++ b/mcld-host-build.mk
@@ -22,20 +22,11 @@
 LOCAL_CFLAGS += -DDARWIN_FLEX=1
 endif
 
-ifeq ($(HOST_OS),windows)
 LOCAL_C_INCLUDES := \
   $(MCLD_ROOT_PATH)/include \
   $(LLVM_ROOT_PATH) \
   $(LLVM_ROOT_PATH)/include \
   $(LLVM_ROOT_PATH)/host/include \
   $(LOCAL_C_INCLUDES)
-else
-LOCAL_C_INCLUDES := \
-  $(MCLD_ROOT_PATH)/include \
-  $(LLVM_ROOT_PATH) \
-  $(LLVM_ROOT_PATH)/include \
-  $(LLVM_ROOT_PATH)/host/include \
-  $(LOCAL_C_INCLUDES)
-endif
 
 LOCAL_IS_HOST_MODULE := true