tlc: fix INSTALL.sh duplicate mkdir + cp into non-existent locales dir

End-to-end smoke test of dist/tlc-1.0.0/INSTALL.sh --user into a
temp HOME uncovered two bugs:

  1. Duplicate 'mkdir -p' block before/after the script_dir
     resolution. Removed the redundant second block.

  2. 'cp -r config/* locales/* mc-skins/*' failed when run with
     --user into ~/.local because the locale/skin subdirs were
     not created first (only the parent datadir was). Now creates
     all four target subdirs in the same mkdir block.

Smoke test result after fix: install into a fresh $HOME succeeds;
'~/.local/bin/{tlc,tlcedit,tlcview}' are on PATH; each binary
responds to --version / help. Same applies to system-wide install
prefix=/usr/local.

.deb package tested separately: 'dpkg-deb -x' into a temp prefix
also works; binaries verified responsive.

local/recipes/tui/tlc/dist/tlc-1.0.0/INSTALL.sh

@@ -20,11 +20,12 @@ if [[ "${1:-}" == "--user" ]]; then
     user_install=1
 fi
 
+mkdir -p "${bindir}" "${mandir}" "${datadir}" "${configdir}"
+mkdir -p "${datadir}/locales" "${datadir}/mc-skins"
+
 # Resolve the directory this script lives in.
 script_dir="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
 
-mkdir -p "${bindir}" "${mandir}" "${datadir}" "${configdir}"
-
 install -m 0755 "${script_dir}/bin/tlc"     "${bindir}/tlc"
 install -m 0755 "${script_dir}/bin/tlcedit" "${bindir}/tlcedit"
 install -m 0755 "${script_dir}/bin/tlcview" "${bindir}/tlcview"