[perl #132338] [Win32] op/pack.t test failures on extended precisionlong double builds of 32-bit perl-5.27.5

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Ever since it has been possible to build 32-bit perl on Windows with an 
nvtype of (extended precision) long double, 2 of the op/pack.t tests (tests 
13177 and 13180) have been failing on those builds.

Patch to t/op/pack.t is attached.

Note: This patch fixes t/op/pack.t for 32-bit builds only. With 64-bit 
builds the script still crashes after the successful completion of test 518. 
(Something to work on.)

Cheers,
Rob 

• Re: [perl #132338] [Win32] op/pack.t test failures on extendedprecision long double builds of 32-bit perl-5.27.5 by sisyphus1
• [perl #132338] [Win32] op/pack.t test failures on extended precisionlong double builds of 32-bit perl-5.27.5 by James E Keenan via RT
• [perl #132338] [Win32] op/pack.t test failures on extended precisionlong double builds of 32-bit perl-5.27.5 by Sisyphus