Add patch for grpc

Author: shivammathur

extension/BuildPhpExtension/patches/grpc.ps1

@@ -0,0 +1,14 @@
+$fn = @"
+ARG_WITH("grpc", "grpc support", "no");
+function CreateFolderIfMissing(path) {
+    if (!path) return;
+    if (!FSO.FolderExists(path)) {
+        WScript.Echo("Creating " + path + "...");
+        FSO.CreateFolder(path);
+    }
+}
+"@
+(Get-Content config.w32) | ForEach-Object { $_.Replace('base_dir+"\\ext\\grpc', 'base_dir+"') } | Set-Content config.w32
+(Get-Content config.w32) | ForEach-Object { $_.Replace('FSO.CreateFolder', 'CreateFolderIfMissing') } | Set-Content config.w32
+(Get-Content config.w32) | ForEach-Object { $_ -replace '/D_WIN32_WINNT=0x600', '/D_WIN32_WINNT=0x600 /FS /std:c11' } | Set-Content config.w32
+(Get-Content config.w32) | ForEach-Object { $_.Replace('ARG_WITH("grpc", "grpc support", "no");', $fn) } | Set-Content config.w32