deps: `MASM.UseSafeExceptionHandlers` for OpenSSL

Use `msvs_settings.MASM.UseSafeExceptionHandlers` when building OpenSSL
assembly code on Windows. This option appends `/safeseh` to the list of
assembler flags when building `.asm` files on Windows.

Having this option in place, separate rules in `masm_compile.gypi` are
no longer needed.

Fix: #7426
PR-URL: https://github.com/nodejs/node/pull/7427
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Bert Belder <bertbelder@gmail.com>

deps/openssl/masm_compile.gypi

@@ -1,44 +0,0 @@
-{
-  'conditions': [
-    ['target_arch=="ia32"', {
-      'rules': [
-        {
-          'rule_name': 'Assemble',
-          'extension': 'asm',
-          'inputs': [],
-          'outputs': [
-            '<(INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).obj',
-          ],
-          'action': [
-            'ml.exe',
-            '/Zi',
-            '/safeseh',
-            '/Fo', '<(INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).obj',
-            '/c', '<(RULE_INPUT_PATH)',
-          ],
-          'process_outputs_as_sources': 0,
-          'message': 'Assembling <(RULE_INPUT_PATH) to <(INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).obj.',
-        }
-      ],
-    }, 'target_arch=="x64"', {
-      'rules': [
-        {
-          'rule_name': 'Assemble',
-          'extension': 'asm',
-          'inputs': [],
-          'outputs': [
-            '<(INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).obj',
-          ],
-          'action': [
-            'ml64.exe',
-            '/Zi',
-            '/Fo', '<(INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).obj',
-            '/c', '<(RULE_INPUT_PATH)',
-          ],
-          'process_outputs_as_sources': 0,
-          'message': 'Assembling <(RULE_INPUT_PATH) to <(INTERMEDIATE_DIR)/<(RULE_INPUT_ROOT).obj.',
-        }
-      ],
-    }],
-  ],
-}

deps/openssl/openssl.gyp

@@ -121,7 +121,12 @@
         }], # end of conditions of openssl_no_asm
         ['OS=="win"', {
           'defines' : ['<@(openssl_defines_all_win)'],
-          'includes': ['masm_compile.gypi',],
+          'msvs_settings': {
+            'MASM': {
+              # Use /safeseh, see commit: 01fa5ee
+              'UseSafeExceptionHandlers': 'true',
+            },
+          },
         }, {
           'defines' : ['<@(openssl_defines_all_non_win)']
         }]