Hi all,

This patch fixes a few fails on i686-pc-cygwin.
 - It adds a few missing $EXEEXT.
 - Adds a new $DLLEXT variable for the dynamic library tests and uses it.

Please review and commit.

Cheers,
Pedro Alves

---
gdb/testsuite/ChangeLog:

2006-12-10  Pedro Alves  <pedro_alves@portugalmail.pt>

    * configure.ac: Check dynamic library extension.  Pass down DLLEXT.
    * configure: Regenerate.
    * Makefile.in (DLLEXT): New variable.
    (just-check): Export DLLEXT.
    * lib/gdb.exp ($DLLEXT): Import from environment.
    * gdb.base/annota1.exp ($binfile): Append $EXEEXT.
    Expect "Loaded symbols for .*".
    * gdb.base/gdb1555.exp ($libobj): Append $DLLEXT instead of ".so".
    * gdb.base/pending.exp ($lib_sl): Append $DLLEXT instead of ".sl".
    * gdb.base/so-impl-ld.exp ($lib_sl): Append $DLLEXT instead of ".sl".