package.bbclass: Allow overriding of debugedit starting path

package.bbclass: Allow overriding of debugedit starting path

In the usual case, the computed path used for debugedit to fix
up path references for the target filesystem is correct. However,
prebuilt binary components, such as prebuilt toolchains, can
have debug paths that do not reflect paths within the local
build directory. Providing an override lets us continue to use
the standard debugedit logic in package.bbclass.

(From OE-Core rev: 32b1fde106bf423873a4a56e1111f230494e2d4a)

Signed-off-by: Peter Seebach <peter.seebach@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>