Add __memcpy_chk assembly for 64 bit.

Bug: 17623887
Change-Id: I443723bc941b40f84884b330d222baabee01f868
Merge "Add __memcpy_chk assembly for 64 bit."
Add a dummy libdl.a.

Change-Id: I4b30b8875f14352bae2948ab8cf544ae818795ab
Make __aeabi_*() symbols weak.

This is needed to avoid multiple symbol definitions when linking with
libstdc++ or with compiler-rt.

Change-Id: I2f713bcff113222f0d2538e49691e715d8a8475d
Fix gdb could not get shared library list issue

Get dynamic flags from phdr table's correct entry rather the first
entry, so that the following DT_DEBUG entry can be set.

Also fix the undefined reference to LoadTask::deleter issue under gcc
-O0 option.

Bug: 17524778
Change-Id: I9c679af197b034761fb739d6c980e628ff2ab84c
Merge "Fix gdb could not get shared library list issue"
Merge "Add a dummy libdl.a."
Merge "Make __aeabi_*() symbols weak."