Fix `patch_locale.sh`

This patch fixes `patch_locale.sh` when it was run using the
relative path syntax (e.g., `./patch_locale.sh`).

In that case, since the script first change the current
directory, the variable `CJDICT` points to a wrong path.

Bug: 421834885
Change-Id: I2981b59bf0046ea6871288199998e12af67e4568
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/6888331
Reviewed-by: Philip Jägenstedt <[email protected]>
(cherry picked from commit d8871921d773f5a06411b3d8d3c2182ddfe32186)
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/6887654
1 file changed