Fix x86 instrumentation exit entrypoint and trace size limit.

The x86 instruction movd only copies a 32-bit value when used with a
memory location. movsd properly copies 64-bits.

Bug: 16386215

(cherry picked from commit cf2e7b0621dfe7fcacd56555dffabab65d1130e7)

Change-Id: I102db8aaa5e8a6b3a88f01e545d1bb51b4f3d5d4
2 files changed