MIPS/GAS/testsuite: Fix n64 compact EH failures

Expect a `.MIPS.options' section alternatively to `.reginfo' and ignore
contents of either as irrelevant for all the affected compact EH tests,
removing these regressions:

mips64-openbsd  -FAIL: Compact EH EB #1 with personality ID and FDE data
mips64-openbsd  -FAIL: Compact EH EB #2 with personality routine and FDE data
mips64-openbsd  -FAIL: Compact EH EB #3 with personality id and large FDE data
mips64-openbsd  -FAIL: Compact EH EB #4 with personality id, FDE data and LSDA
mips64-openbsd  -FAIL: Compact EH EB #5 with personality routine, FDE data and LSDA
mips64-openbsd  -FAIL: Compact EH EB #6 with personality id, LSDA and large FDE data
mips64-openbsd  -FAIL: Compact EH EL #1 with personality ID and FDE data
mips64-openbsd  -FAIL: Compact EH EL #2 with personality routine and FDE data
mips64-openbsd  -FAIL: Compact EH EL #3 with personality id and large FDE data
mips64-openbsd  -FAIL: Compact EH EL #4 with personality id, FDE data and LSDA
mips64-openbsd  -FAIL: Compact EH EL #5 with personality routine, FDE data and LSDA
mips64-openbsd  -FAIL: Compact EH EL #6 with personality id, LSDA and large FDE data
mips64el-openbsd  -FAIL: Compact EH EB #1 with personality ID and FDE data
mips64el-openbsd  -FAIL: Compact EH EB #2 with personality routine and FDE data
mips64el-openbsd  -FAIL: Compact EH EB #3 with personality id and large FDE data
mips64el-openbsd  -FAIL: Compact EH EB #4 with personality id, FDE data and LSDA
mips64el-openbsd  -FAIL: Compact EH EB #5 with personality routine, FDE data and LSDA
mips64el-openbsd  -FAIL: Compact EH EB #6 with personality id, LSDA and large FDE data
mips64el-openbsd  -FAIL: Compact EH EL #1 with personality ID and FDE data
mips64el-openbsd  -FAIL: Compact EH EL #2 with personality routine and FDE data
mips64el-openbsd  -FAIL: Compact EH EL #3 with personality id and large FDE data
mips64el-openbsd  -FAIL: Compact EH EL #4 with personality id, FDE data and LSDA
mips64el-openbsd  -FAIL: Compact EH EL #5 with personality routine, FDE data and LSDA
mips64el-openbsd  -FAIL: Compact EH EL #6 with personality id, LSDA and large FDE data

Co-Authored-By: Maciej W. Rozycki <macro@orcam.me.uk>

	gas/
	* testsuite/gas/mips/compact-eh-eb-1.d: Accept `.MIPS.options'
	section as an alternative to `.reginfo' and ignore contents of
	either.
	* testsuite/gas/mips/compact-eh-eb-2.d: Likewise.
	* testsuite/gas/mips/compact-eh-eb-3.d: Likewise.
	* testsuite/gas/mips/compact-eh-eb-4.d: Likewise.
	* testsuite/gas/mips/compact-eh-eb-5.d: Likewise.
	* testsuite/gas/mips/compact-eh-eb-6.d: Likewise.
	* testsuite/gas/mips/compact-eh-el-1.d: Likewise.
	* testsuite/gas/mips/compact-eh-el-2.d: Likewise.
	* testsuite/gas/mips/compact-eh-el-3.d: Likewise.
	* testsuite/gas/mips/compact-eh-el-4.d: Likewise.
	* testsuite/gas/mips/compact-eh-el-5.d: Likewise.
	* testsuite/gas/mips/compact-eh-el-6.d: Likewise.