Just: fix MSYS2 path conversion for bazel targets on Windows

On Windows Git Bash, MSYS2 converts // prefixes to / when passing
arguments to non-MSYS programs, breaking Bazel target labels like
//language-packs:foo. Set MSYS2_ARG_CONV_EXCL="*" to disable this.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: redsun82

misc/just/build.just

@@ -8,11 +8,11 @@ _build_dist LANGUAGE: _require_semmle_code (_maybe_build_dist LANGUAGE)
 # Build the language-specific distribution if we are in an internal repository checkout
 # Otherwise, do nothing
 [no-exit-message]
-_maybe_build_dist LANGUAGE: (_if_in_semmle_code (f'cd "$SEMMLE_CODE"; tools/bazel test //language-packs:intree-{{LANGUAGE}}-as-test --test_output=all') '# using codeql from PATH, if any')
+_maybe_build_dist LANGUAGE: (_if_in_semmle_code (f'cd "$SEMMLE_CODE"; MSYS2_ARG_CONV_EXCL="*" tools/bazel test //language-packs:intree-{{LANGUAGE}}-as-test --test_output=all') '# using codeql from PATH, if any')
 
 # Call bazel. Uses our official bazel wrapper if we are in an internal repository checkout
 [no-cd, no-exit-message]
-_bazel COMMAND *ARGS: (_if_in_semmle_code 'cd "$SEMMLE_CODE"; tools/bazel' 'bazel' COMMAND ARGS)
+_bazel COMMAND *ARGS: (_if_in_semmle_code 'cd "$SEMMLE_CODE"; MSYS2_ARG_CONV_EXCL="*" tools/bazel' 'bazel' COMMAND ARGS)
 
 # Call sembuild (requires an internal repository checkout)
 [no-cd, no-exit-message]