icu build broken for node v0.12.x

[springmeyer]

  clang++ '-DU_COMMON_IMPLEMENTATION=1' '-DU_ATTRIBUTE_DEPRECATED=' '-D_CRT_SECURE_NO_DEPRECATE=' '-DU_STATIC_IMPLEMENTATION=1' '-DUCONFIG_NO_LEGACY_CONVERSION=1' '-DUCONFIG_NO_IDNA=1' '-DUCONFIG_NO_TRANSLITERATION=1' '-DUCONFIG_NO_SERVICE=1' '-DUCONFIG_NO_REGULAR_EXPRESSIONS=1' '-DU_ENABLE_DYLOAD=0' '-DU_HAVE_STD_STRING=0' '-DUCONFIG_NO_BREAK_ITERATION=0' '-DUCONFIG_NO_CONVERSION=1' -I../deps/icu/source/common  -pthread -Wall -Wextra -Wno-unused-parameter -m64 -Wno-deprecated-declarations -O3 -ffunction-sections -fdata-sections -fno-omit-frame-pointer -fno-rtti -fno-exceptions -std=c++11 -frtti -MMD -MF /tmp/v0.12.0/out/Release/.deps//tmp/v0.12.0/out/Release/obj.target/icuucx/deps/icu/source/common/appendable.o.d.raw  -c -o /tmp/v0.12.0/out/Release/obj.target/icuucx/deps/icu/source/common/appendable.o ../deps/icu/source/common/appendable.cpp
  g++ '-DU_COMMON_IMPLEMENTATION=1' '-DU_I18N_IMPLEMENTATION=1' '-DU_IO_IMPLEMENTATION=1' '-DU_TOOLUTIL_IMPLEMENTATION=1' '-DU_ATTRIBUTE_DEPRECATED=' '-D_CRT_SECURE_NO_DEPRECATE=' '-DU_STATIC_IMPLEMENTATION=1' '-DUCONFIG_NO_LEGACY_CONVERSION=1' '-DUCONFIG_NO_IDNA=1' '-DUCONFIG_NO_TRANSLITERATION=1' '-DUCONFIG_NO_SERVICE=1' '-DUCONFIG_NO_REGULAR_EXPRESSIONS=1' '-DU_ENABLE_DYLOAD=0' '-DU_HAVE_STD_STRING=0' '-DUCONFIG_NO_BREAK_ITERATION=0' -I../deps/icu/source/common -I../deps/icu/source/i18n -I../deps/icu/source/io -I../deps/icu/source/tools/toolutil  -pthread -Wall -Wextra -Wno-unused-parameter -m64 -Wno-deprecated-declarations -O3 -ffunction-sections -fdata-sections -fno-omit-frame-pointer -fno-rtti -fno-exceptions -std=c++11 -frtti -MMD -MF /tmp/v0.12.0/out/Release/.deps//tmp/v0.12.0/out/Release/obj.host/icutools/deps/icu/source/tools/toolutil/xmlparser.o.d.raw  -c -o /tmp/v0.12.0/out/Release/obj.host/icutools/deps/icu/source/tools/toolutil/xmlparser.o ../deps/icu/source/tools/toolutil/xmlparser.cpp
cc1plus: error: unrecognized command line option ‘-std=c++11’
make[2]: *** [/tmp/v0.12.0/out/Release/obj.host/icutools/deps/icu/source/tools/toolutil/xmlparser.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory `/tmp/v0.12.0/out'
make[1]: *** [node] Error 2
make[1]: Leaving directory `/tmp/v0.12.0'
make: *** [node-v0.12.0-linux-x64.tar.gz] Error 2
The command "./.travis.sh" exited with 2.

Note that because of a bug in gyp {CC,CXX}_host must also be set.
Otherwise gcc/g++ will be used by default for part of the build.

nodejs/node-v0.x-archive@ac2857b#diff-e2d5a00791bce9a01f99bc6fd613a39d

[springmeyer]

fixed by mapbox/node@dfb89fc