gdb-cross-canadian: use correct exec-prefix path for python
Incorrect exec-prefix path was given to gdb which leads to gdb
startup failure when SDK is not installed to its original destination.
Gdb relocates the exec-prefix path, so it will work for SDKs that
are installed to different location. PYTHONHOME env in no longer
neeeded for gdb.
[YOCTO #3839]
(From OE-Core master rev:
e77603324332b932c73c9e22ab65a0b9b7c17798)
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
