app-text/texlive-core: call reautoconf to apply cairo build fixes, drop --enable-year2038

Disable --enable-year2038 while it snuck in during testing of the new
texlive 2023 ebuilds.

Closes: https://bugs.gentoo.org/927714
Signed-off-by: Florian Schmaus <flow@gentoo.org>

app-text/texlive-core/texlive-core-2023-r5.ebuild

@@ -225,6 +225,10 @@ src_prepare() {
 	default
 
 	elibtoolize
+
+	# Drop this once cairo's autoconf patches are gone. See
+	# https://bugs.gentoo.org/927714#c4 and https://bugs.gentoo.org/853121.
+	"${S}"/reautoconf libs/cairo || die
 }
 
 src_configure() {
@@ -271,7 +275,6 @@ src_configure() {
 		--enable-tektronixwin
 		--enable-unitermwin
 		--enable-vlna
-		--enable-year2038
 		--disable-psutils
 		--disable-t1utils
 		--enable-ipc