Adjust the makefiles to RPM/YUM UNIXROOT toolchain.
It should still be possible to build OpenJDK w/o RPM/YUM or
UNIXROOT by having manual configuration variable assigments
and binary tools installation but this setup is no longer
supported by us (and therefore all binary tools are
removed from SVN). Note that the RPM environment usually
contains much more recent versions of all utilities needed
for the build.