icu4c: preserve configure arguments #2290
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Please feel free to consider this a bug report and fix it yourself if you feel like. I'm just trying to keep OpenWrt downstream patches to the minimum, so sending it here for your consideration, I'm not sure I'll be able to properly create a corresponding Jira issue etc.
We want to avoid word splitting on the configure arguments during substitution.
A problem was exposed by using CC="ccache mips-openwrt-linux-musl-gcc" (that is, cross-compiling for MIPS OpenWrt with ccache enabled), it failed to build without this change.
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