Fix references to configure-{msys,mingw,cygwin,common}*.sh

Makefile.am

@@ -18,12 +18,7 @@ EXTRA_DIST = \
 	extras/package/win32/libvlc.dll.manifest \
 	extras/package/win32/peflags.pl \
 	extras/package/win32/change-contribs-directory.sh \
-	extras/package/win32/configure-common.sh \
-	extras/package/win32/configure-cygwin.sh \
-	extras/package/win32/configure-mingw64.sh \
-	extras/package/win32/configure-mingw-release.sh \
-	extras/package/win32/configure-mingw.sh \
-	extras/package/win32/configure-msys.sh \
+	extras/package/win32/configure.sh \
 	extras/package/macosx/README.MacOSX.rtf \
 	extras/package/rpm/vlc.fedora.spec \
 	extras/package/rpm/vlc.altlinux.spec \

doc/release-howto.txt

@@ -33,7 +33,7 @@
   - Update developers.v.o/vlc and www.v.o/vlc/download-sources.html
 
  * Win32 Packages
-  - configure using the extras/package/win32/configure-mingw-release.sh script
+  - configure using the extras/package/win32/configure.sh script
   - move to altair and generate md5 plus SHA1 hashes and gpg signature of these files
     (c.f. Tarballs)