Remove the specialized copy of libtool
which was used for linking to uClibc++, which is now removed.
Also remove references to the deprecated fixup targets
that invoked this specialized libtool, which no package uses.
Ref: 6b2ed6101 ("uclibc++: remove")
Ref: c10515db6 ("re-enable the libtool PKG_BUILD_DEPENDS for PKG_FIXUP")
Ref: 246a5b334 ("More libtool madness")
Signed-off-by: Michael Pratt <mcpratt@pm.me>
83c1bf2cd4