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: #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/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)']
         }]