compiler: test traps report correct line numbers (#1528)

Signed-off-by: Nuno Cruces <ncruces@users.noreply.github.com>

internal/testing/dwarftestdata/data.go

@@ -19,6 +19,9 @@ var TinyGoWasm []byte
 //go:embed testdata/zig/main.wasm
 var ZigWasm []byte
 
+//go:embed testdata/zig-cc/main.wasm
+var ZigCCWasm []byte
+
 // RustWasm comes with huge DWARF sections, so we do not check it in directly,
 // but instead xz-compressed one is.
 var RustWasm []byte

internal/testing/dwarftestdata/testdata/zig-cc/main.c

@@ -0,0 +1,13 @@
+volatile int base = 65536;
+
+void a() {
+  char str[16];
+  str[4] = 'a';
+  str[8] = 'b';
+  str[12 + base] = 'c';  // This traps.
+}
+
+int main() {
+  a();
+  return 0;
+}