ANDROID: build: cuttlefish: Upgrade clang to newer version.

The last upgrade introduced a new build failure, because it had a bug
which caused it to emit PLT relocations, certain types of which cannot
be handled by the reloc tool in the kernel.

See https://bugs.llvm.org/show_bug.cgi?id=36674 for more details.

Bug: 63889157
Change-Id: I813febdbacb0579abcb12dc7f2164cce1e2f5a26
Signed-off-by: Alistair Strachan <astrachan@google.com>

build.config.cuttlefish.x86_64

@@ -6,7 +6,7 @@ DEFCONFIG=x86_64_cuttlefish_defconfig
 EXTRA_CMDS=''
 KERNEL_DIR=common
 POST_DEFCONFIG_CMDS="check_defconfig"
-CLANG_PREBUILT_BIN=prebuilts-master/clang/host/linux-x86/clang-4679922/bin
+CLANG_PREBUILT_BIN=prebuilts-master/clang/host/linux-x86/clang-r328903/bin
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin
 FILES="
 arch/x86/boot/bzImage