Update default cross-compile install prefix for the latest mingw toolchain

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402510

configure.in

@@ -2373,7 +2373,7 @@ case "$host" in
         ARCH=win32
         if test "$build" != "$host"; then # cross-compiling
             # Default cross-compile location
-            ac_default_prefix=/usr/local/cross-tools/i386-mingw32msvc
+            ac_default_prefix=/usr/local/cross-tools/i386-mingw32
         else
             # Look for the location of the tools and install there
             if test "$BUILD_PREFIX" != ""; then