shared: move "nm-compat.[hc]" to "src/contrib/"

"nm-compat.h" is not intended to be used by NetworkManager itself.
Instead, it's intended to be copied into the source tree of VPN plugins,
as adapter for different libnm versions.

Move it to "src/contrib/".

Makefile.am

@@ -1902,7 +1902,8 @@ src_libnm_client_impl_tests_test_remote_settings_client_CPPFLAGS = $(src_libnm_c
 src_libnm_client_impl_tests_test_secret_agent_CPPFLAGS = $(src_libnm_client_impl_tests_cppflags)
 
 src_libnm_client_impl_tests_test_libnm_SOURCES = \
-	shared/nm-utils/nm-compat.c \
+	src/contrib/nm-compat.c \
+	src/contrib/nm-compat.h \
 	src/libnm-client-impl/tests/test-libnm.c \
 	$(NULL)
 
@@ -5521,8 +5522,6 @@ EXTRA_DIST += \
 	\
 	po/meson.build \
 	\
-	shared/nm-utils/nm-compat.c \
-	shared/nm-utils/nm-compat.h \
 	shared/meson.build \
 	\
 	src/meson.build \

src/contrib/meson.build

@@ -1,3 +1,5 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
 nm_vpn_plugin_utils_source = files('nm-vpn-plugin-utils.c')
+
+src_contrib_nm_compat_source = files('nm-compat.c')

src/libnm-client-impl/tests/meson.build

@@ -10,7 +10,7 @@ test_units = [
 foreach test_unit: test_units
   exe = executable(
     test_unit,
-    test_unit + '.c',
+    [ test_unit + '.c' ] + (test_unit == 'test-libnm' ? src_contrib_nm_compat_source : []),
     include_directories: [
       libnm_client_public_inc,
     ],