[clang] [clang][analyzer] Support `fputc` in StreamChecker (PR #71518)

[Balázs Kéri via cfe-commits]

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@@ -14,6 +14,12 @@ void check_fwrite(void) {
   fclose(fp);
 }
 
+void check_fgetc(void) {
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balazske wrote:

This should be `check_fputc`.

https://github.com/llvm/llvm-project/pull/71518