Fix irregexp build after r42140

BUG=v8:5402

Review-Url: https://codereview.chromium.org/2628473003
Cr-Commit-Position: refs/heads/master@{#42165}

src/regexp/interpreter-irregexp.cc

@@ -9,6 +9,7 @@
 #include "src/regexp/interpreter-irregexp.h"
 
 #include "src/ast/ast.h"
+#include "src/objects-inl.h"
 #include "src/regexp/bytecodes-irregexp.h"
 #include "src/regexp/jsregexp.h"
 #include "src/regexp/regexp-macro-assembler.h"

src/regexp/regexp-macro-assembler-irregexp.cc

@@ -7,9 +7,10 @@
 #include "src/regexp/regexp-macro-assembler-irregexp.h"
 
 #include "src/ast/ast.h"
+#include "src/objects-inl.h"
 #include "src/regexp/bytecodes-irregexp.h"
-#include "src/regexp/regexp-macro-assembler.h"
 #include "src/regexp/regexp-macro-assembler-irregexp-inl.h"
+#include "src/regexp/regexp-macro-assembler.h"
 
 namespace v8 {
 namespace internal {