Fix building ltrace on PowerPC.

On 20090115.0012+0100, "Andy Johnson" <ajohnson@aecno.com> wrote:
ltrace wouldn't build on PowerPC because in the
sysdeps/linux-gnu directory in the ltrace source tree
the powerpc directory is called ppc. I added some code
in 400-ltrace.sh to create a symlink for it so it will
build now.

Patch slightly modified by me before applying.

/trunk/scripts/build/debug/400-ltrace.sh | 5 5 0 0 +++++
1 file changed, 5 insertions(+)

# Compute x86_64-specific values

CT_DoArchTupleValues() {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}"

}