Use the kernel's sa_restorer for aarch64.

gdb was happy with what we had, but libgcc and libunwind weren't.
libgcc is happy with the kernel's restorer (because of the extra nop),
though libunwind looks like it's going to need code changes regardless.

We could make our restorer more like the kernel's one, but why bother
when we can just let the kernel supply the canonical one?

Bug: 17436734
Change-Id: I330fa5e68f23b1cf8133aa552896657b0b873ed3
Clean up the architecture-specific makefiles.

Group things appropriately and name each group.

Change-Id: I0da45eb0ccde19c31d5e984d0e6eb3dad26630dc
Merge "Clean up the architecture-specific makefiles."
Merge "Use the kernel's sa_restorer for aarch64."
Pull input.h from v3.16.1 kernel headers.

(cherry-pick of 027d2717d067c3706f22bf84dc1226ede7c1566d.)

Bug: 17407564
Change-Id: Idcfc40a7254605280e3d5474c61ae1ab7b2b7b51
Merge "Pull input.h from v3.16.1 kernel headers."
Fix some 32-bit-isms in <stdio.h>.

(cherry-pick of 2d80400a9e8454038a3ec29959436184be0c4c65.)

Bug: 17157793
Change-Id: I8290e240b92e5617f4c12c0eacad6e622e677b6a
Merge "Fix some 32-bit-isms in <stdio.h>."
Add Android*.mk files to additional dependencies

Bug: 17548097
Change-Id: Ie0d9c8f33459320008f561217c54eba42d283b47
Merge "Add Android*.mk files to additional dependencies"
Temporary disable DL_WARNs for unused DT_*

Bug: 17552334
Change-Id: I2f7b5e4b4d1db96e812a7f86adc929e113d4c11a
Merge "Temporary disable DL_WARNs for unused DT_*"
Update kernel uapi headers to v3.16.1.

Other changes to support the new headers:

- Remove the flock64 structure it is defined in the new headers.
- Update the syscalls to correspond with the headers.

Change-Id: I49a6b07e8b2bfffb67be71b07b58e4e6848fcc09
Merge "Update kernel uapi headers to v3.16.1."