[Bug 40386] New: wininet:url regression caused by new cross-compiler

https://bugs.winehq.org/show_bug.cgi?id=40386

Bug ID: 40386
           Summary: wininet:url regression caused by new cross-compiler
           Product: Wine
           Version: 1.9.6
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: wininet
          Assignee: [e-mail]
          Reporter: [e-mail]

The WineHQ upgrade changed the cross-compiler used to generate the reference
WineTest executables. Since the upgrade the wininet:url 32 bit test has these
failures on Windows XP + Internet Explorer 6:

url.c:507: Test failed: InternetCrackUrl returned 0 with GLE=87 (expected to
return 0 and ERROR_INVALID_HANDLE or ERROR_INSUFFICIENT_BUFFER)
url.c:521: Test failed: InternetCrackUrl failed with 87
url.c:522: Test failed: lpszScheme was "" instead of "about"
url.c:523: Test failed: lpszHostName was "" instead of "host"
url.c:524: Test failed: lpszUrlPath was "`ù"" instead of "/blank"

See:
https://test.winehq.org/data/tests/wininet:url.html
https://www.winehq.org/pipermail/wine-devel/2016-March/112371.html

I can reproduce the problem with this compiler:
$ i686-w64-mingw32-gcc --version
i686-w64-mingw32-gcc (GCC) 5.3.1 20160205

But if I recompile the tests with -O0 the failures go away which points to a
compiler bug.
We need to either:
* Switch to a non buggy compiler to build the reference WineTest executables.
  (which might involve reporting the bug in the first place)

* Add 'CFLAGS = -g -O0' to the test's Makefile.in as a workaround.
  (preferably once we can point to a relevant compiler bug)

* Find some other nicer workaround in the C file.