Add no-ident for GCC when -d:release (#12454)

compiler/extccomp.nim

@@ -63,8 +63,8 @@ compiler gcc:
   result = (
     name: "gcc",
     objExt: "o",
-    optSpeed: " -O3 ",
-    optSize: " -Os ",
+    optSpeed: " -O3 -fno-ident",
+    optSize: " -Os -fno-ident",
     compilerExe: "gcc",
     cppCompiler: "g++",
     compileTmpl: "-c $options $include -o $objfile $file",
@@ -664,7 +664,7 @@ proc addExternalFileToCompile*(conf: ConfigRef; c: var Cfile) =
     c.flags.incl CfileFlag.Cached
   else:
     # make sure Nim keeps recompiling the external file on reruns
-    # if compilation is not successful  
+    # if compilation is not successful
     discard tryRemoveFile(c.obj.string)
   conf.toCompile.add(c)