external-sourcery-toolchain: Fix installation of lib/locale.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
external-sourcery-toolchain: Package libinproctrace library.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
external-sourcery-toolchain: Handle tuning libs different from toolchain libs.

Handle the case where the tuning BASE_LIB specifier is different from what
an external toolchain is compiled as.  This assumes that the tuning parameters
are correct for the toolchain being used.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>