re-pin to latest native host implementation, changed managed code sig…

…nature

scripts/Makefile

@@ -170,7 +170,9 @@ run-host: $(RUN_TARGETS) dotnetlibs/host_cmdline internal-prepare-exec_env
 	# check if corerun is the right one (could be the debug version)
 	if ! diff dotnetlibs/corerun $(MONAD_EXT)/coreclr/Release/corerun; then cp -r $(MONAD_EXT)/coreclr/Release/* dotnetlibs; fi
 	# execute a cmdlet, this will auto-load the utility module and print a, b and c in 3 lines
-	cd exec_env/app_base && PSMODULEPATH=$(shell pwd)/exec_env/app_base/Modules LD_LIBRARY_PATH=. ./host_cmdline powershell-simple.exe '"a","b","c","a","a" | Select-Object -Unique'
+	#cd exec_env/app_base && PSMODULEPATH=$(shell pwd)/exec_env/app_base/Modules LD_LIBRARY_PATH=. ./host_cmdline
+	#cd exec_env/app_base && PSMODULEPATH=$(shell pwd)/exec_env/app_base/Modules LD_LIBRARY_PATH=. ./host_cmdline powershell-simple.exe '"a","b","c","a","a" | Select-Object -Unique'
+	cd exec_env/app_base && PSMODULEPATH=$(shell pwd)/exec_env/app_base/Modules LD_LIBRARY_PATH=. ./host_cmdline -b /tmp "powershell-simple, version=1.0.0.0, culture=neutral, PublicKeyToken=null" "ps_hello_world.Program" "UnmanagedMain" '"a","b","c","a","a" | Select-Object -Unique'
 
 run-interactive: $(POWERSHELL_RUN_TARGETS) dotnetlibs/corerun dotnetlibs/Microsoft.PowerShell.Commands.Management.dll dotnetlibs/Microsoft.PowerShell.Commands.Utility.dll dotnetlibs/Microsoft.PowerShell.Security.dll dotnetlibs/api-ms-win-core-registry-l1-1-0.dll internal-prepare-exec_env
 	# check if corerun is the right one (could be the debug version)

src/powershell-run/powershell-simple.cs

@@ -524,7 +524,7 @@ static void test2(string[] args)
             }
         }
 
-        public static void UnmanagedMain(int argc, [MarshalAs(UnmanagedType.LPArray,ArraySubType=UnmanagedType.LPStr,SizeParamIndex=0)] String[] argv)
+        public static int UnmanagedMain(int argc, [MarshalAs(UnmanagedType.LPArray,ArraySubType=UnmanagedType.LPStr,SizeParamIndex=0)] String[] argv)
         {
             init();
             List<String> allArgs = new List<String>();
@@ -535,6 +535,8 @@ public static void UnmanagedMain(int argc, [MarshalAs(UnmanagedType.LPArray,Arra
             }
 
             test2(allArgs.ToArray());
+
+            return 0;
         }
 
         static void Main(string[] args)