sys-devel/patch: fix incorrect reliance on split-usr

It hardcodes a compile-time path to `ed`. This is known and handled
already because ${ED} is part of portage and does not point to `ed`. But
the "fix" was to do a $PATH lookup, which in turn broke binpackage
hosting (and profile migration, likely).

The package doesn't have USE=split-usr and we shouldn't add one just for
this. Make sure the portable API filename is used.

Bug: https://bugs.gentoo.org/470210
Closes: https://bugs.gentoo.org/957593
Signed-off-by: Eli Schwartz <eschwartz@gentoo.org>

sys-devel/patch/patch-2.7.6-r8.ebuild

@@ -68,8 +68,9 @@ src_configure() {
 		# rename to gpatch for better BSD compatibility
 		--program-prefix=g
 	)
-	# Do not let $ED mess up the search for `ed` 470210.
-	ac_cv_path_ED=$(type -P ed) \
+	# Do not let $ED or $PATH (split-usr) mess up the search for `ed`:
+	# bug 470210 / bug 957593
+	ac_cv_path_ED="${EPREFIX}/bin/ed" \
 		econf "${myeconfargs[@]}"
 }
 

sys-devel/patch/patch-2.8-r1.ebuild

@@ -58,8 +58,9 @@ src_configure() {
 		# rename to gpatch for better BSD compatibility
 		--program-prefix=g
 	)
-	# Do not let $ED mess up the search for `ed` 470210.
-	ac_cv_path_ED=$(type -P ed) \
+	# Do not let $ED or $PATH (split-usr) mess up the search for `ed`:
+	# bug 470210 / bug 957593
+	ac_cv_path_ED="${EPREFIX}/bin/ed" \
 		econf "${myeconfargs[@]}"
 }