The fix for bug 28544 moved our package data from ./share/mysql
to ./share.  mysqld_safe had the old directory hard-coded.  The
fix is to use the @pkgdatadir@ and @prefix@ values, to adapt to
different ways of building the package.


scripts/make_binary_distribution.sh:
  Document that our build system explicitly overrides the @pkgfoo@ (e.g.,
  pkgdatadir, pkglibdir, etc.) variables when 'make' is called.
scripts/mysqld_safe.sh:
  Replace hard-coded "./share/mysql" with something like
  echo @pkgdatadir@ | sed -e s/^@prefix@//.
  
  Since the fix for bug 28544, this has been broken for mysql 5.1+,
  where the package data dir is "./share" instead of "./share/mysql".