1) Make prep_env.pl apply a patch to epoc32/sbs_config/s60_sbs_config.xml to replace the ARM kernel-side runtime ksrt4_0.lib with the GCCE one ksrt_gcce.lib 2) Fix romnibus.pl so it won't do case-tampering on the epocroot prefix of source paths in oby/iby files.

# *** Change this file if and only if you are rebuilding from a new
# upstream baseline ***
# This package was branched from
# http://developer.symbian.org/oss/MCL/sftools/dev/build)
# at Mercurial revision:
0f5e3a7fb6af