More CI tragets: Linux 32bit, LTO, Windows and Cosmopolitan

Atomics support in Windows requires libwinpthread*.dll at runtime. One
way to get it is to install it with MinGW package, and copy alongside
the executable.

Update test Makefile targets for windows executables.

Allow running tests with Wine: `make WINE=wine CONFIG_WIN3=y
...`. That's useful when Wine binfmt support cannot be installed such
as on the CI hosts.

Add PPC64LE architecture and try to fix flaky multi-arch CI in gcc:
https://github.com/tonistiigi/binfmt/issues/215

.gitignore

@@ -6,14 +6,20 @@ test_fib.c
 examples/*.so
 examples/hello
 examples/hello_module
+examples/hello.exe
+examples/test_fib.exe
 hello.c
 microbench*.txt
 qjs
+qjs.exe
 qjsc
+qjsc.exe
+host-qjsc
 qjscalc
 qjscalc.c
 repl.c
 run-test262
+run-test262.exe
 test262
 test262_*.txt
 test262o
@@ -22,3 +28,4 @@ unicode
 unicode_gen
 run_octane
 run_sunspider_like
+libwinpthread*.dll