bug#45303: 28.0.50; [feature/native-comp] comp.c compilation error on Windows 10

[Eli Zaretskii]

> From: Liāu, Kiong-Gē 廖宮毅 <gongyi.liao@gmail.com>
> Date: Fri, 18 Dec 2020 18:57:37 -0600
> Cc: Andrea Corallo <akrl@sdf.org>, 45303@debbugs.gnu.org
> 
> Thread 1 received signal SIGTRAP, Trace/breakpoint trap.
> 0x00007ffeb8a493e3 in KERNELBASE!DebugBreak () from
> /c/WINDOWS/System32/KERNELBASE.dll
> (gdb) bt
> #0  0x00007ffeb8a493e3 in KERNELBASE!DebugBreak () from
> /c/WINDOWS/System32/KERNELBASE.dll
> #1  0x00000004001adbbc in emacs_abort () at ../../src/src/w32fns.c:10847
> #2  0x000000040009d7cc in bidi_initialize () at ../../src/src/bidi.c:1096

This means Emacs was started without the uni-bidi.el file being
available.  Or maybe that file failed to load (because of some previous
problem in the build).  E.g., perhaps there's an invalid uni-bidi.eln
file, and Emacs tried to load it in preference to .el/.elc file.