[ClangASTContext] Placate `casts away qualifiers` warnings from GCC.

llvm-svn: 300476
diff --git a/lldb/source/Symbol/ClangASTContext.cpp b/lldb/source/Symbol/ClangASTContext.cpp
index 482a083..6ad3530 100644
--- a/lldb/source/Symbol/ClangASTContext.cpp
+++ b/lldb/source/Symbol/ClangASTContext.cpp
@@ -4484,7 +4484,8 @@
       const clang::ObjCInterfaceType *objc_interface_type =
           objc_class_type->getInterfaceType();
       if (objc_interface_type &&
-          GetCompleteType((lldb::opaque_compiler_type_t)objc_interface_type)) {
+          GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
+              const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
         clang::ObjCInterfaceDecl *class_interface_decl =
             objc_interface_type->getDecl();
         if (class_interface_decl) {
@@ -4592,7 +4593,8 @@
       const clang::ObjCInterfaceType *objc_interface_type =
           objc_class_type->getInterfaceType();
       if (objc_interface_type &&
-          GetCompleteType((lldb::opaque_compiler_type_t)objc_interface_type)) {
+          GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
+              const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
         clang::ObjCInterfaceDecl *class_interface_decl =
             objc_interface_type->getDecl();
         if (class_interface_decl) {
@@ -5660,7 +5662,8 @@
     const clang::ObjCInterfaceType *objc_interface_type =
         objc_class_type->getInterfaceType();
     if (objc_interface_type &&
-        GetCompleteType((lldb::opaque_compiler_type_t)objc_interface_type)) {
+        GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
+            const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
       clang::ObjCInterfaceDecl *class_interface_decl =
           objc_interface_type->getDecl();
       if (class_interface_decl) {
@@ -5807,7 +5810,8 @@
     const clang::ObjCInterfaceType *objc_interface_type =
         objc_class_type->getInterfaceType();
     if (objc_interface_type &&
-        GetCompleteType((lldb::opaque_compiler_type_t)objc_interface_type)) {
+        GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
+            const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
       clang::ObjCInterfaceDecl *class_interface_decl =
           objc_interface_type->getDecl();
       if (class_interface_decl) {