demo: wasi: using wasm extension in lpi to support older lazarus

demo/wasienv/canvas/canvasdraw.lpi

@@ -33,7 +33,7 @@
   <CompilerOptions>
     <Version Value="11"/>
     <Target>
-      <Filename Value="canvasdraw"/>
+      <Filename Value="canvasdraw.wasm" ApplyConventions="False"/>
     </Target>
     <SearchPaths>
       <IncludeFiles Value="$(ProjOutDir)"/>

demo/wasienv/terminal/sums.lpi

@@ -7,7 +7,6 @@
         <MainUnitHasCreateFormStatements Value="False"/>
         <MainUnitHasTitleStatement Value="False"/>
         <MainUnitHasScaledStatement Value="False"/>
-        <UseDefaultCompilerOptions Value="True"/>
       </Flags>
       <SessionStorage Value="InProjectDir"/>
       <Title Value="sums"/>
@@ -34,7 +33,7 @@
   <CompilerOptions>
     <Version Value="11"/>
     <Target>
-      <Filename Value="sums"/>
+      <Filename Value="sums.wasm" ApplyConventions="False"/>
     </Target>
     <SearchPaths>
       <IncludeFiles Value="$(ProjOutDir)"/>