Undefined variable icu_path during configure when system-icu is set

[AdamMajer]

Version: node-git master branch
Platform: openSUSE Tumbleweed

node-git.f585dca83d> ./configure --prefix=/usr --enable-lto --shared-zlib --shared-cares 
--with-intl=system-icu --shared-nghttp2 --gdb --without-dtrace --openssl-use-def-ca-store

gyp: Undefined variable icu_path in
/home/abuild/rpmbuild/BUILD/node-git.f585dca83d/tools/v8_gypfiles/v8.gyp 
while loading dependencies of /home/abuild/rpmbuild/BUILD/node-git.f585dca83d/node.gyp
while trying to load /home/abuild/rpmbuild/BUILD/node-git.f585dca83d/node.gyp
Error running GYP

There are no problems with Node 12.x branches.

[AdamMajer]

This now affects the Node 12.x staging branch.