CMake option to install utils, e.g. FileCheck

The goal is to replace nacl tests' use of a hand-crafted filecheck
tool, with LLVM's FileCheck. To do so, we need to first ensure
FileCheck is copied to the install directory.

To that end, this CL introduces a build flag, LLVM_INSTALL_UTILS.

A separate CL enables this switch in toolchain_build_pnacl.py, see https://codereview.chromium.org/1018123002/

BUG=NONE
R=dschuff@chromium.org

Review URL: https://codereview.chromium.org/1019043002

Author: mtrofin

CMakeLists.txt

@@ -65,6 +65,9 @@ if (NOT PACKAGE_VERSION)
   set(PACKAGE_VERSION "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}svn")
 endif()
 
+# @LOCALMOD
+option(LLVM_INSTALL_UTILS "Include utility binaries in the 'install' target." OFF)
+
 option(LLVM_INSTALL_TOOLCHAIN_ONLY "Only include toolchain files in the 'install' target." OFF)
 
 option(LLVM_USE_FOLDERS "Enable solution folders in Visual Studio. Disable for Express versions." ON)

cmake/modules/AddLLVM.cmake

@@ -500,6 +500,11 @@ endmacro(add_llvm_example name)
 macro(add_llvm_utility name)
   add_llvm_executable(${name} ${ARGN})
   set_target_properties(${name} PROPERTIES FOLDER "Utils")
+# @LOCALMOD-BEGIN
+  if( LLVM_INSTALL_UTILS )
+    install (TARGETS ${name} RUNTIME DESTINATION bin)
+  endif()
+# @LOCALMOD-END
 endmacro(add_llvm_utility name)