makeBinaryWrapper: add -Wno-overlength-strings

The generated C code contains large string literals that are longer than
the maximum length specified by the standard.

However, GCC has no trouble dealing with those strings, so we can just
add -Wno-overlength-strings.

https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Woverlength-strings

pkgs/build-support/setup-hooks/make-binary-wrapper.sh

@@ -46,6 +46,7 @@ makeWrapper() {
     makeDocumentedCWrapper "$original" "$@" | \
       @CC@ \
         -Wall -Werror -Wpedantic \
+        -Wno-overlength-strings \
         -Os \
         -x c \
         -o "$wrapper" -