Reapply "OnDiskHashTable: Use EndianStream.h to write little endian ostreams"

Committed this by accident before it was done last time.

Original message:

    Rather than rolling our own functions to write little endian data
    to an ostream, we can use the support in llvm's EndianStream.h.

    No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205061 91177308-0d34-0410-b5e6-96231b3b80d8
Reapply "OnDiskHashTable: Use Endian.h to read little endian ostreams"

Committed this by accident before it was done last time.

Original message:

    Rather than rolling our own functions to read little endian data
    from a buffer, we can use the support in llvm's Endian.h.

    No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205062 91177308-0d34-0410-b5e6-96231b3b80d8
libclang/libIndex: USR generation: mangle source location into USRs for macros,
unless the macro comes from a system header


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205064 91177308-0d34-0410-b5e6-96231b3b80d8
[SemaObjC] For the semantics of the designated-initializer attribute, consider that the ObjC interface of the class
includes its class extensions.

This is follow-up for rdar://16305347

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205065 91177308-0d34-0410-b5e6-96231b3b80d8