Privatize host_port.h; was not used in any wrapped language implementation
diff --git a/gRPC-C++.podspec b/gRPC-C++.podspec
index 55f33d9..3022c3d 100644
--- a/gRPC-C++.podspec
+++ b/gRPC-C++.podspec
@@ -205,6 +205,7 @@
                       'src/core/lib/gpr/arena.h',
                       'src/core/lib/gpr/env.h',
                       'src/core/lib/gpr/fork.h',
+                      'src/core/lib/gpr/host_port.h',
                       'src/core/lib/gpr/mpscq.h',
                       'src/core/lib/gpr/murmur_hash.h',
                       'src/core/lib/gpr/spinlock.h',
@@ -451,6 +452,7 @@
                               'src/core/lib/gpr/arena.h',
                               'src/core/lib/gpr/env.h',
                               'src/core/lib/gpr/fork.h',
+                              'src/core/lib/gpr/host_port.h',
                               'src/core/lib/gpr/mpscq.h',
                               'src/core/lib/gpr/murmur_hash.h',
                               'src/core/lib/gpr/spinlock.h',