build: cherry pick V8 change 6f68f30 for windows DLL support

Add force_dynamic_crt option to build a static library with /MD on windows

Adds option to build a V8 library statically, but with the options on
windows that allows it to be subsequently included in another DLL. On
Windows this is required for it to correclty link against the correct
C++ runtime. Require for our Node.js shared library build.

PR-URL: nodejs#8084
Reference:  nodejs#7487
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

deps/v8/build/toolchain.gypi

@@ -39,6 +39,7 @@
     'ubsan_vptr%': 0,
     'v8_target_arch%': '<(target_arch)',
     'v8_host_byteorder%': '<!(python -c "import sys; print sys.byteorder")',
+    'force_dynamic_crt%': 0,
     # Native Client builds currently use the V8 ARM JIT and
     # arm/simulator-arm.cc to defer the significant effort required
     # for NaCl JIT support. The nacl_target_arch variable provides
@@ -995,7 +996,7 @@
           'VCCLCompilerTool': {
             'Optimization': '0',
             'conditions': [
-              ['component=="shared_library"', {
+              ['component=="shared_library" or force_dynamic_crt==1', {
                 'RuntimeLibrary': '3',  # /MDd
               }, {
                 'RuntimeLibrary': '1',  # /MTd
@@ -1047,7 +1048,7 @@
             'StringPooling': 'true',
             'BasicRuntimeChecks': '0',
             'conditions': [
-              ['component=="shared_library"', {
+              ['component=="shared_library" or force_dynamic_crt==1', {
                 'RuntimeLibrary': '3',  #/MDd
               }, {
                 'RuntimeLibrary': '1',  #/MTd
@@ -1235,7 +1236,7 @@
                 'FavorSizeOrSpeed': '0',
                 'StringPooling': 'true',
                 'conditions': [
-                  ['component=="shared_library"', {
+                  ['component=="shared_library" or force_dynamic_crt==1', {
                     'RuntimeLibrary': '2',  #/MD
                   }, {
                     'RuntimeLibrary': '0',  #/MT

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 4
 #define V8_MINOR_VERSION 5
 #define V8_BUILD_NUMBER 103
-#define V8_PATCH_LEVEL 42
+#define V8_PATCH_LEVEL 43
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)