Apply RISC-V autoreconf patch
ref: https://archlinux.org/todo/apply-risc-v-autoreconf-patches/
-I /usr/share/gettext/m4 to fix:
configure.in:425: error: possibly undefined macro: AM_ICONV
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ref: https://archlinux.org/todo/apply-risc-v-autoreconf-patches/
-I /usr/share/gettext/m4 to fix:
configure.in:425: error: possibly undefined macro: AM_ICONV