texlive: fix executables and postinst

- Preload libkpathsea.so.6 in $PKGDIR to make sure `make texlinks' creates
  executable symlinks to the correct paths.
- Bump trie_size in /etc/texmf/web2c/texmf.cnf to fix postinst.

app-doc/texlive/autobuild/build

@@ -44,8 +44,14 @@ make
 
 abinfo "Installing TeX Live binaries..."
 make install DESTDIR="$PKGDIR"
+
 abinfo "Creating symlinks to actual binaries.."
-make texlinks DESTDIR="$PKGDIR"
+# FIXME: Symlink installation requires kpsewhich, which depends on
+# libkpathsea.so.6, which is not yet available in LD_LIBRARY_PATH.
+#
+# Ref: https://gitlab.archlinux.org/archlinux/packaging/packages/texlive-bin/-/blob/f83b722db0c99cef02c18db41947b95299f0c735/PKGBUILD#L115
+LD_PRELOAD="$PKGDIR/usr/lib/libkpathsea.so.6" \
+    make texlinks DESTDIR="$PKGDIR"
 
 cd ..
 

app-doc/texlive/autobuild/overrides/etc/texmf/web2c/texmf.cnf

@@ -734,7 +734,7 @@ buf_size = 200000
 % for all known free hyphenation patterns to be loaded simultaneously
 % (as TeX Live does).
 %
-trie_size = 1000000
+trie_size = 4194303
 
 hyph_size = 8191        % prime number of hyphenation exceptions, >610, <32767.
                         % http://primes.utm.edu/curios/page.php/8191.html