libphonenumber-cpp: update to version 8.9.2

Allow build with either protobuf-cpp or protobuf3-cpp.

See #690

devel/libphonenumber-cpp/Portfile

@@ -4,7 +4,7 @@ PortSystem          1.0
 PortGroup           cmake 1.1
 PortGroup           github 1.0
 
-github.setup        googlei18n libphonenumber 8.9.1 v
+github.setup        googlei18n libphonenumber 8.9.2 v
 name                libphonenumber-cpp
 license             Apache-2
 description         Google's C++ library for parsing, formatting, storing \
@@ -14,9 +14,9 @@ maintainers         {devans @dbevans} openmaintainer
 categories          devel
 platforms           darwin
 
-checksums           rmd160  bf406f798a6a80ac4bcb5965cc8b5a9696c199f7 \
-                    sha256  1675d18fb0b4e88b818a983d8df53c99bed4fb64e3f8cd84c94d9cc94b636e14 \
-                    size    6850319
+checksums           rmd160  ce57274756fd1f51a98798d737071712cdd37787 \
+                    sha256  fac29449fcda4c597712ec1223b2a24c5f1d806ef9afb0c8b04faefb2f94f727 \
+                    size    6849667
 
 worksrcdir          ${worksrcdir}/cpp
 
@@ -37,8 +37,10 @@ depends_build-append \
                     port:pkgconfig
 
 depends_lib-append  port:boost \
-                    port:icu \
-                    port:protobuf-cpp
+                    port:icu
+
+# enable build with either protobuf-cpp or protobuf3-cpp
+depends_lib-append  path:${prefix}/lib/libprotobuf.dylib:protobuf-cpp
 
 configure.args-append \
                     -DGTEST_SOURCE_DIR=${gtest_srcdir} \