Update nasm.props

Make `nasm.props` consistent with the `install_script.bat` script

Author: TracerDS

nasm.props

@@ -11,11 +11,11 @@
   <ItemDefinitionGroup>
     <NASM>
       <ObjectFileName>$(IntDir)%(FileName).obj</ObjectFileName>
-      <CommandLineTemplate Condition="'$(Platform)' == 'Win32'">"$(NasmPath)nasm.exe" -Xvc -f win32 [AllOptions] [AdditionalOptions] "%(FullPath)"</CommandLineTemplate>
-      <CommandLineTemplate Condition="'$(Platform)' == 'x64'">"$(NasmPath)nasm.exe" -Xvc -f win64 [AllOptions] [AdditionalOptions] "%(FullPath)"</CommandLineTemplate>
+      <CommandLineTemplate Condition="'$(Platform)' == 'Win32'">"$(NasmPath)\nasm.exe" -Xvc -f win32 [AllOptions] [AdditionalOptions] "%(FullPath)"</CommandLineTemplate>
+      <CommandLineTemplate Condition="'$(Platform)' == 'x64'">"$(NasmPath)\nasm.exe" -Xvc -f win64 [AllOptions] [AdditionalOptions] "%(FullPath)"</CommandLineTemplate>
       <CommandLineTemplate Condition="'$(Platform)' != 'Win32' and '$(Platform)' != 'x64'">echo NASM not supported on this platform
 exit 1</CommandLineTemplate>
       <ExecutionDescription>%(Identity)</ExecutionDescription>
     </NASM>
   </ItemDefinitionGroup>
-</Project>
+</Project>