[ASTImporter] Added test case for CXXConversionDecl importing

Reviewers: a.sidorin, a_sidorin

Reviewed By: a_sidorin

Subscribers: a_sidorin, martong, cfe-commits

Differential Revision: https://reviews.llvm.org/D50552

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@339505 91177308-0d34-0410-b5e6-96231b3b80d8

test/Import/conversion-decl/Inputs/F.cpp

@@ -0,0 +1,10 @@
+class Y {
+  int M;
+};
+
+class X {
+  int N, M;
+
+public:
+  operator Y();
+};

test/Import/conversion-decl/test.cpp

@@ -0,0 +1,5 @@
+// RUN: clang-import-test -import %S/Inputs/F.cpp -expression %s
+void expr() {
+  X X1;
+  Y Y1 = X1;
+}