Force to build llvm from source in 64-bit host build.
Bug: 13751317
Change-Id: I4a4150bfe21607eb7a2342bbd8120b431427eee5
diff --git a/core/config.mk b/core/config.mk
index 84ff3fe..287944e 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -358,7 +358,7 @@
# ---------------------------------------------------------------
# Generic tools.
-LEX := prebuilts/misc/$(BUILD_OS)-$(BUILD_ARCH)/flex/flex-2.5.39
+LEX := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/flex/flex-2.5.39
# The default PKGDATADIR built in the prebuilt bison is a relative path
# external/bison/data.
# To run bison from elsewhere you need to set up enviromental variable