Cygwin: syscalls.cc: remove ".dll" from blessed_executable_suffixes

This reverts commit d9e9c7b5a7.  The latter added ".dll" to the
blessed_executable_suffixes array because on 32-bit Windows, the
GetBinaryType function would report that a 64-bit DLL is an
executable, contrary to the documentation of that function.

That anomaly does not exist on 64-bit Windows, so we can remove ".dll"
from the list.  Reverting the commit does, however, change the
behavior of the rename(2) syscall in the following unlikely situation:
Suppose we have an executable foo.exe and we make the call

  rename ("foo", "bar.dll");

Previously, foo.exe would be renamed to bar.dll.  So bar.dll would
then be an executable without the .exe extension.  The new behavior is
that foo.exe will be renamed to bar.dll.exe.  [Exception: If there
already existed an executable (not a DLL!) with the name bar.dll, then
.exe will not be appended.]

0 files changed, 0 insertions, 0 deletions