[asan] allow asan to use SizeClassAllocator32 on a 64-bit platform (if SANITIZER_CAN_USE_ALLOCATOR64=0). No functionality change by default is intended

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@198044 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Delete asan_intercepted_functions.h, move the code into asan_interceptors.h
Fixes https://code.google.com/p/address-sanitizer/issues/detail?id=188.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@198048 91177308-0d34-0410-b5e6-96231b3b80d8