Fix r8-as-r9 and SIMD format widths when printing x86 signal fpstate (#3811)
Fix r8-as-r9 and SIMD format widths when printing x86 signal fpstate (#3811)

Fixes a bug where r8's value is printed for r9 in signal fpstate.
Changes incorrect 2-byte output formatting to 4-byte for ymmh and
32-bit xmm.
AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio