deps,v8: fix gyp build on Aix platform

Floating this patch since the code does not exist upstream anymore.

deps/v8/testing/gtest.gyp:
Suppress -Wnonnull-compare, -Waddress warnings for
deps/v8/testing/gtest project;

deps/v8/src/compiler/store-store-elimination.cc,
deps/v8/src/conversions.cc:
Suppress unused function warnings in order to compile with newer
(>4.8.5) gcc on Aix.

PR-URL: #23958
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Author: Vasili Skurydzin

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 6
 #define V8_MINOR_VERSION 2
 #define V8_BUILD_NUMBER 414
-#define V8_PATCH_LEVEL 72
+#define V8_PATCH_LEVEL 73
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/compiler/store-store-elimination.cc

@@ -251,6 +251,9 @@ void StoreStoreElimination::Run(JSGraph* js_graph, Zone* temp_zone) {
   }
 }
 
+#if V8_OS_AIX
+ALLOW_UNUSED_TYPE
+#endif
 bool RedundantStoreFinder::IsEffectful(Node* node) {
   return (node->op()->EffectInputCount() >= 1);
 }
@@ -552,6 +555,9 @@ bool UnobservableStore::operator==(const UnobservableStore other) const {
   return (id_ == other.id_) && (offset_ == other.offset_);
 }
 
+#if V8_OS_AIX
+ALLOW_UNUSED_TYPE
+#endif
 bool UnobservableStore::operator!=(const UnobservableStore other) const {
   return !(*this == other);
 }

deps/v8/src/conversions.cc

@@ -53,11 +53,17 @@ class StringCharacterStreamIterator {
 };
 
 
+#if V8_OS_AIX
+ALLOW_UNUSED_TYPE
+#endif
 StringCharacterStreamIterator::StringCharacterStreamIterator(
     StringCharacterStream* stream) : stream_(stream) {
   ++(*this);
 }
 
+#if V8_OS_AIX
+ALLOW_UNUSED_TYPE
+#endif
 uint16_t StringCharacterStreamIterator::operator*() const {
   return current_;
 }

deps/v8/testing/gtest.gyp

@@ -94,6 +94,10 @@
                   'action????': ['$(TargetPath)', '--gtest_print_time'],
                 },
               }],
+              ['OS=="aix"', {
+               'cflags': [ '-Wno-nonnull-compare',
+                           '-Wno-address' ],
+              }],
             ],
           }],
         ],