libtool: don't prefix the installed binary

Typically libtool installs the binary to 'libtool' in the source tree,
but we've got patches to rename this to ${host_sys}-libtool. As this
isn't standard any upstream that don't respect the LIBTOOL variable need
to be told explicitly where libtool is, which is a long-term maintenance
burden for us on top of the initial libtool patches.

The reasoning for this renaming appears to stem from the design to be
sure that we're using our new/patched libtool and not the host's binary.
However, now that we have HOSTTOOLS, there's no way to run the host
libtool so this argument is moot.

This patch removes the libtool renaming, follow-up patches remove the
required modifications from the rest of the recipes.

[RP: Remove commented patch lines]
(From OE-Core rev: 4b308773eca7570ce5007e8f953b56252c17fdb1)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/libtool/libtool-native_2.4.6.bb

@@ -2,8 +2,6 @@ require libtool-${PV}.inc
 
 DEPENDS = ""
 
-SRC_URI += "file://prefix.patch"
-
 inherit native
 
 EXTRA_OECONF = " --with-libtool-sysroot=${STAGING_DIR_NATIVE}"
@@ -18,5 +16,5 @@ do_configure:prepend () {
 do_install () {
 	autotools_do_install
 	install -d ${D}${bindir}/
-	install -m 0755 ${HOST_SYS}-libtool ${D}${bindir}/${HOST_SYS}-libtool
+	install -m 0755 libtool ${D}${bindir}/libtool
 }