Fix shadowing error for inline assembly.

test/libsolidity/semanticTests/inlineAssembly/external_identifier_access_shadowing.sol

@@ -1,12 +0,0 @@
-contract C {
-    function f() public returns (uint x) {
-        assembly {
-            function g() -> f { f := 2 }
-            x := g()
-        }
-    }
-}
-// ====
-// compileViaYul: also
-// ----
-// f() -> 2

test/libsolidity/semanticTests/inlineAssembly/inline_assembly_storage_access_inside_function.sol

@@ -7,11 +7,11 @@ contract C {
         uint256 off1;
         uint256 off2;
         assembly {
-            function f() -> o1 {
+            function g() -> o1 {
                 sstore(z.slot, 7)
                 o1 := y.offset
             }
-            off2 := f()
+            off2 := g()
         }
         assert(off2 == 2);
         return true;

test/libsolidity/semanticTests/inlineAssembly/leave.sol

@@ -1,5 +1,5 @@
 contract C {
-    function f() public pure returns (uint w) {
+    function g() public pure returns (uint w) {
         assembly {
             function f() -> t {
                 t := 2
@@ -14,4 +14,4 @@ contract C {
 // compileToEwasm: also
 // compileViaYul: also
 // ----
-// f() -> 2
+// g() -> 2