xray: Add missing header to list of installed headers.

[pcc]

Summary

Spotted by gn's llvm/utils/gn/build/sync_source_lists_from_cmake.py script.

It wasn't clear to me whether this is actually supposed to be a public
header or not, so sending this out for review.

[dberris]

LGTM -- thanks! Yes, this should have been public all along.

compiler-rt/trunk/include/CMakeLists.txt

set(SANITIZER_HEADERS
     sanitizer/tsan_interface_atomic.h
     )
 endif(COMPILER_RT_BUILD_SANITIZERS)
 
 if (COMPILER_RT_BUILD_XRAY)
   set(XRAY_HEADERS
     xray/xray_interface.h
     xray/xray_log_interface.h
+    xray/xray_records.h
     )
 endif(COMPILER_RT_BUILD_XRAY)
 
 set(COMPILER_RT_HEADERS
   ${SANITIZER_HEADERS}
   ${XRAY_HEADERS})
 
 set(output_dir ${COMPILER_RT_OUTPUT_DIR}/include)