Update tests/regress/resultmap for IRIX 6

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Pete Forman
Your email address : pete(dot)forman(at)westgeo(dot)com

System Configuration
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Architecture (example: Intel Pentium) : MIPS R8000

Operating System (example: Linux 2.0.26 ELF) : IRIX 6.5.5m

PostgreSQL version (example: PostgreSQL-7.0): PostgreSQL-7.0.2

Compiler used (example: gcc 2.8.0) : MIPSpro 7.3

Please enter a FULL description of your problem:
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The regression tests abstime, horology, int2, int4, and tinterval fail
by default. They will pass if comparison is made to one of the
variant expected/*.out files.

(A related problem is that the geometry test fails. This seems to be
just a matter of FP precision but more rigorous inspection is needed.
No existing expected/geometry-*.out variant matches.)

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
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cd tests/regress
gmake runcheck

If you know how this problem might be fixed, list the solution below:
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