K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2021-02-17T01:36:14.997865Z
K 7
svn:log
V 916
sysutils/memtest86+: remove dependency on gcc48

This is one of three ports still explicitly dependent on lang/gcc48. The
problems that were preventing the upgrade were as follows:

- The __OUT*/__IN* macros in io.h were declaring the produced functions as
  extern, yielding multiple "definitions." They're inline asm, so just give
  them static linkage.

- reboot was declared inline with non-static linkage, thus leaving it in a
  weird state where it wasn't visible within the same CU or another CU.
  Drop the inline for now; if it really needs to be inlined, it can be
  moved into a header and declared `static inline`.

I made these changes, then discovered there's a 5.31b that's still in
testing. I checked the archive for that and was delighted to discover these
changes had already actually been made there, too, so let's consider this a
backport.

PR:		253303
Approved by:	avg (maintainer)
MFH:		2021Q1

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