[CMake] Enable ARM target in Fuchsia toolchain

This is still used by some users of Fuchsia toolchain. Also include
llc and opt which is useful for development and testing.

Differential Revision: https://reviews.llvm.org/D32231

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@300917 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/caches/Fuchsia-stage2.cmake

 # This file sets up a CMakeCache for the second stage of a Fuchsia toolchain
 # build.
 
-set(LLVM_TARGETS_TO_BUILD X86;AArch64 CACHE STRING "")
+set(LLVM_TARGETS_TO_BUILD X86;ARM;AArch64 CACHE STRING "")
 
 set(PACKAGE_VENDOR Fuchsia CACHE STRING "")
 
@@ -36,6 +36,7 @@ set(BUILTINS_aarch64-fuchsia-none_CMAKE_SYSTEM_NAME Fuchsia CACHE STRING "")
 # Setup toolchain.
 set(LLVM_INSTALL_TOOLCHAIN_ONLY ON CACHE BOOL "")
 set(LLVM_TOOLCHAIN_TOOLS
+  llc
   llvm-ar
   llvm-cov
   llvm-cxxfilt
@@ -49,6 +50,7 @@ set(LLVM_TOOLCHAIN_TOOLS
   llvm-readobj
   llvm-size
   llvm-symbolizer
+  opt
   CACHE STRING "")
 
 set(LLVM_DISTRIBUTION_COMPONENTS