This patch is active only for MinGW32 targets.
Whilst using absolute Windows paths (eg C:/) is the easiest
way to configure and install for MinGW32, you don't really
want hard coded drive letters in the binary. This patch
strips off initial drive letters before GNUSTEP_SYSTEM_ROOT,
GNUSTEP_LOCAL_ROOT and GNUSTEP_NETWORK_ROOT are sent as "-D"
defines to the compiler to be hard coded.
There is a corresponding patch (see next e-mail) to NSUser.m
which dynamically prepends the "system drive" drive letter
to these paths at runtime if they are required.
Note that if there are environment variables set for
GNUSTEP_SYSTEM_ROOT etc at runtime, these hard coded paths
and prepended drive letter are NOT consulted.