lineage: Use $(HOST_PREBUILT_TAG) where possible

Change-Id: If211d23ce72b3404368cd723cbb9ea801e61802c

build/tasks/bacon.mk

@@ -1,5 +1,5 @@
 # Copyright (C) 2017 Unlegacy-Android
-# Copyright (C) 2017 The LineageOS Project
+# Copyright (C) 2017,2020 The LineageOS Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,7 +18,7 @@
 
 LINEAGE_TARGET_PACKAGE := $(PRODUCT_OUT)/lineage-$(LINEAGE_VERSION).zip
 
-MD5 := prebuilts/build-tools/path/$(HOST_OS)-x86/md5sum
+MD5 := prebuilts/build-tools/path/$(HOST_PREBUILT_TAG)/md5sum
 
 .PHONY: bacon
 bacon: $(INTERNAL_OTA_PACKAGE_TARGET)

build/tasks/kernel.mk

@@ -187,7 +187,7 @@ ifeq ($(TARGET_KERNEL_CLANG_COMPILE),true)
         # Use the default version of clang if TARGET_KERNEL_CLANG_VERSION hasn't been set by the device config
         KERNEL_CLANG_VERSION := $(LLVM_PREBUILTS_VERSION)
     endif
-    TARGET_KERNEL_CLANG_PATH ?= $(BUILD_TOP)/prebuilts/clang/host/$(HOST_OS)-x86/$(KERNEL_CLANG_VERSION)
+    TARGET_KERNEL_CLANG_PATH ?= $(BUILD_TOP)/prebuilts/clang/host/$(HOST_PREBUILT_TAG)/$(KERNEL_CLANG_VERSION)
     ifeq ($(KERNEL_ARCH),arm64)
         KERNEL_CLANG_TRIPLE ?= CLANG_TRIPLE=aarch64-linux-gnu-
     else ifeq ($(KERNEL_ARCH),arm)

config/BoardConfigKernel.mk

@@ -1,4 +1,4 @@
-# Copyright (C) 2018-2019 The LineageOS Project
+# Copyright (C) 2018-2020 The LineageOS Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -52,7 +52,7 @@ else
 KERNEL_ARCH := $(TARGET_KERNEL_ARCH)
 endif
 
-GCC_PREBUILTS := $(BUILD_TOP)/prebuilts/gcc/$(HOST_OS)-x86
+GCC_PREBUILTS := $(BUILD_TOP)/prebuilts/gcc/$(HOST_PREBUILT_TAG)
 # arm64 toolchain
 KERNEL_TOOLCHAIN_arm64 := $(GCC_PREBUILTS)/aarch64/aarch64-linux-android-4.9/bin
 KERNEL_TOOLCHAIN_PREFIX_arm64 := aarch64-linux-android-
@@ -126,8 +126,8 @@ ifneq ($(TARGET_KERNEL_ADDITIONAL_FLAGS),)
 endif
 
 TOOLS_PATH_OVERRIDE := \
-    PATH=$(BUILD_TOP)/prebuilts/tools-lineage/$(HOST_OS)-x86/bin:$$PATH \
-    LD_LIBRARY_PATH=$(BUILD_TOP)/prebuilts/tools-lineage/$(HOST_OS)-x86/lib:$$LD_LIBRARY_PATH \
+    PATH=$(BUILD_TOP)/prebuilts/tools-lineage/$(HOST_PREBUILT_TAG)/bin:$$PATH \
+    LD_LIBRARY_PATH=$(BUILD_TOP)/prebuilts/tools-lineage/$(HOST_PREBUILT_TAG)/lib:$$LD_LIBRARY_PATH \
     PERL5LIB=$(BUILD_TOP)/prebuilts/tools-lineage/common/perl-base
 
 # Set DTBO image locations so the build system knows to build them
@@ -136,7 +136,7 @@ BOARD_PREBUILT_DTBOIMAGE ?= $(TARGET_OUT_INTERMEDIATES)/DTBO_OBJ/arch/$(KERNEL_A
 endif
 
 # Set use the full path to the make command
-KERNEL_MAKE_CMD := $(BUILD_TOP)/prebuilts/build-tools/$(HOST_OS)-x86/bin/make
+KERNEL_MAKE_CMD := $(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/make
 
 # Set the full path to the gcc command
 ifeq ($(HOST_OS),darwin)
@@ -148,8 +148,8 @@ KERNEL_MAKE_FLAGS += HOSTCC=$(KERNEL_HOST_TOOLCHAIN_ROOT)gcc
 KERNEL_MAKE_FLAGS += HOSTCXX=$(KERNEL_HOST_TOOLCHAIN_ROOT)g++
 
 # Since Linux 4.16, flex and bison are required
-KERNEL_MAKE_FLAGS += LEX=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_OS)-x86/bin/flex
-KERNEL_MAKE_FLAGS += YACC=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_OS)-x86/bin/bison
+KERNEL_MAKE_FLAGS += LEX=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/flex
+KERNEL_MAKE_FLAGS += YACC=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/bison
 TOOLS_PATH_OVERRIDE += BISON_PKGDATADIR=$(BUILD_TOP)/prebuilts/build-tools/common/bison
 
 # Set the out dir for the kernel's O= arg