Add -fsantize to link flags. (#2506)

The option "SPIRV_USE_SANITIZER=address" does not work as stated in our
documentation because the link step fails for the tools.  We have to add
-fsanitize to the link flags so the correct libraries are added on the
link step.

Fixes https://github.com/KhronosGroup/SPIRV-Tools/issues/2482.

CMakeLists.txt

@@ -140,6 +140,8 @@ function(spvtools_default_compile_options TARGET)
       if(NOT "${SPIRV_USE_SANITIZER}" STREQUAL "")
         target_compile_options(${TARGET} PRIVATE
           -fsanitize=${SPIRV_USE_SANITIZER})
+        set_target_properties(${TARGET} PROPERTIES
+          LINK_FLAGS -fsanitize=${SPIRV_USE_SANITIZER})
       endif()
       target_compile_options(${TARGET} PRIVATE
          -ftemplate-depth=1024)

kokoro/scripts/linux/build.sh

@@ -46,7 +46,7 @@ fi
 ADDITIONAL_CMAKE_FLAGS=""
 if [ $CONFIG = "ASAN" ]
 then
-  ADDITIONAL_CMAKE_FLAGS="-DCMAKE_CXX_FLAGS=-fsanitize=address -DCMAKE_C_FLAGS=-fsanitize=address"
+  ADDITIONAL_CMAKE_FLAGS="SPIRV_USE_SANITIZER=address"
   [ $COMPILER = "clang" ] || { echo "$CONFIG requires clang"; exit 1; }
 elif [ $CONFIG = "COVERAGE" ]
 then