misc: fix ubuntu 20.04 python deps

Type: fix
Change-Id: I9cdfbffd6333d090f970422bf047aaa90c1e4c65
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vpp-api/python/CMakeLists.txt b/src/vpp-api/python/CMakeLists.txt
index 910df6b..6450fd9 100644
--- a/src/vpp-api/python/CMakeLists.txt
+++ b/src/vpp-api/python/CMakeLists.txt
@@ -11,7 +11,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-find_package(Python3 COMPONENTS Interpreter)
+if (CMAKE_VERSION VERSION_LESS 3.12)
+  find_package(PythonInterp 2.7)
+else()
+  find_package(Python3 COMPONENTS Interpreter)
+endif()
 
 if(PYTHONINTERP_FOUND)
   install(