Don't make rustc depend on librustc

Author: marijnh

mk/target.mk

@@ -50,8 +50,7 @@ $$(TBIN$(1)_T_$(2)_H_$(3))/rustc$$(X):				\
 		$$(TSREQ$(1)_T_$(2)_H_$(3))					\
 		$$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_RUSTLLVM)	\
 		$$(TCORELIB_DEFAULT$(1)_T_$(2)_H_$(3))      \
-		$$(TSTDLIB_DEFAULT$(1)_T_$(2)_H_$(3))       \
-		$$(TLIBRUSTC_DEFAULT$(1)_T_$(2)_H_$(3))
+		$$(TSTDLIB_DEFAULT$(1)_T_$(2)_H_$(3))
 	@$$(call E, compile_and_link: $$@)
 	$$(STAGE$(1)_T_$(2)_H_$(3))  -o $$@ $$<