debuginfo: Add LLDB autotests to debuginfo test suite.

This commit adds LLDB autotests to the test suite but does not activate them by default yet.

src/test/debuginfo/tuple-style-enum.rs

@@ -12,6 +12,9 @@
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
+
+// === GDB TESTS ===================================================================================
+
 // gdb-command:set print union on
 // gdb-command:rbreak zzz
 // gdb-command:run
@@ -29,6 +32,23 @@
 // gdb-command:print univariant
 // gdb-check:$4 = {{-1}}
 
+
+// === LLDB TESTS ==================================================================================
+
+// lldb-command:run
+
+// lldb-command:print case1
+// lldb-check:[...]$0 = Case1(0, 31868, 31868, 31868, 31868)
+
+// lldb-command:print case2
+// lldb-check:[...]$1 = Case2(0, 286331153, 286331153)
+
+// lldb-command:print case3
+// lldb-check:[...]$2 = Case3(0, 6438275382588823897)
+
+// lldb-command:print univariant
+// lldb-check:[...]$3 = TheOnlyCase(-1)
+
 #![allow(unused_variable)]
 
 // The first element is to ensure proper alignment, irrespective of the machines word size. Since
@@ -70,7 +90,7 @@ fn main() {
 
     let univariant = TheOnlyCase(-1);
 
-    zzz();
+    zzz(); // #break
 }
 
 fn zzz() {()}