build: don't build icu with -fno-rtti
ICU should be compiled with -frtti (and it sets that flag in its gyp file) but it was also inheriting the -fno-rtti flag from common.gypi, breaking the build on some systems.
Fixes: #8867 (closed)
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ICU should be compiled with -frtti (and it sets that flag in its gyp file) but it was also inheriting the -fno-rtti flag from common.gypi, breaking the build on some systems.
Fixes: #8867 (closed)