Fix issue #829 "Compiler crashes when declaring maps with procedure"

Inits `o->value` in `check_expr_base_internal()` so doesn't accidentally
  use last (the proc lit was being set to that of previous string)
Adds test to "tests/issues" and changes CI to use new "run" shells

tests/issues/run.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -eu
+
+mkdir -p tests/issues/build
+
+COMMON="-collection:tests=tests -out:tests/issues/build/test_issue"
+
+set -x
+
+./odin build tests/issues/test_issue_829.odin $COMMON
+tests/issues/build/test_issue
+
+./odin build tests/issues/test_issue_1592.odin $COMMON
+tests/issues/build/test_issue
+
+set +x
+
+rm -rf tests/issues/build