build: Fix definition of LLC/LLVM_AS

Using bindir doesn't work on windows anymore. Something to do with us not
actually installing it, but running directly from the build directory, maybe
just an LLVM bug.

Author: brson

Makefile.in

@@ -237,8 +237,8 @@ LLVM_LDFLAGS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --ldflags)
 LLVM_CXXFLAGS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --cxxflags)
 LLVM_HOST_TRIPLE_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --host-target)
 
-LLVM_AS_$(1)=$$(LLVM_BINDIR_$(1))/llvm-as$$(X)
-LLC_$(1)=$$(LLVM_BINDIR_$(1))/llc$$(X)
+LLVM_AS_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-as$$(X)
+LLC_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llc$$(X)
 
 endef