Allow using ash as the shell for ./configure and make.
After an idea by "Martin Guy" <martinwguy@yahoo.it>:
http://sourceware.org/ml/crossgcc/2008-08/msg00037.html

/trunk/scripts/crosstool.sh | 4 4 0 0 ++++
/trunk/config/global/build-behave.in | 14 14 0 0 ++++++++++++++
2 files changed, 18 insertions(+)

 --- gcc-4.1.2.orig/libstdc++-v3/include/c_std/std_cstdio.h	2005-10-30 23:21:50.000000000 +0100

 +++ gcc-4.1.2/libstdc++-v3/include/c_std/std_cstdio.h	2007-03-04 23:33:27.000000000 +0100

 @@ -143,7 +143,7 @@

    using ::vsprintf;

  }

 -#if _GLIBCXX_USE_C99

 +#if _GLIBCXX_USE_C99 || defined(__UCLIBC__)

  #undef snprintf

  #undef vfscanf