ANDROID: Move CLANGTOOLS/RUST_PREBUILT_BIN to build.config.common.

from build.config.constants. They don't need to be exposed
in @kernel_toolchain_info, hence they do not belong to
build.config.constants.

Test: TH
Bug: 284390729
Change-Id: Ic38dd9b759f30f5d311d00fb77ac7cce78b26aef
Signed-off-by: Yifan Hong <elsk@google.com>

Author: jacky8hyf

build.config.common

@@ -3,7 +3,9 @@
 LLVM=1
 DEPMOD=depmod
 CLANG_PREBUILT_BIN=prebuilts/clang/host/linux-x86/clang-${CLANG_VERSION}/bin
+CLANGTOOLS_PREBUILT_BIN=prebuilts/clang-tools/linux-x86/bin
 BUILDTOOLS_PREBUILT_BIN=build/kernel/build-tools/path/linux-x86
+RUST_PREBUILT_BIN=prebuilts/rust/linux-x86/${RUSTC_VERSION}/bin
 DTC=${ROOT_DIR}/${BUILDTOOLS_PREBUILT_BIN}/dtc
 
 KCFLAGS="${KCFLAGS} -D__ANDROID_COMMON_KERNEL__"

build.config.constants

@@ -1,7 +1,5 @@
 BRANCH=android-mainline
 CLANG_VERSION=r475365b
 RUSTC_VERSION=1.68.0
-CLANGTOOLS_PREBUILT_BIN=prebuilts/clang-tools/linux-x86/bin
-RUST_PREBUILT_BIN=prebuilts/rust/linux-x86/${RUSTC_VERSION}/bin
 AARCH64_NDK_TRIPLE=aarch64-linux-android31
 X86_64_NDK_TRIPLE=x86_64-linux-android31