ast exporter: Remove ampersands from asm operand contraints

fw-immunant · fw-immunant · commit 04746d703b89 · 2022-04-29T13:27:18.000-04:00
not doing so could lead to a double-ampersand being emitted, which is not correct see #382
diff --git a/c2rust-ast-exporter/src/AstExporter.cpp b/c2rust-ast-exporter/src/AstExporter.cpp
@@ -1075,6 +1075,7 @@ class TranslateASTVisitor final
             case '=':
             case '+':
             case '*':
+            case '&':
                 break;
 
             case 'g':
