Fine tune pdo_pgsql and pgsql extensions checks

Reporting this issue upstream instead
https://bugzilla.opensuse.org/show_bug.cgi?id=1236400

Author: petk

cmake/ext/pdo_pgsql/CMakeLists.txt

@@ -85,7 +85,7 @@ set_package_properties(
 
 target_link_libraries(php_ext_pdo_pgsql PUBLIC PostgreSQL::PostgreSQL)
 
-# Sanity check.
+# Check PostgreSQL library (libpq) features.
 if(TARGET PostgreSQL::PostgreSQL)
   cmake_push_check_state(RESET)
     set(CMAKE_REQUIRED_LIBRARIES PostgreSQL::PostgreSQL)

cmake/ext/pgsql/CMakeLists.txt

@@ -84,6 +84,7 @@ set_package_properties(
 
 target_link_libraries(php_ext_pgsql PUBLIC PostgreSQL::PostgreSQL)
 
+# Check PostgreSQL library (libpq) features.
 if(TARGET PostgreSQL::PostgreSQL)
   cmake_push_check_state(RESET)
     set(CMAKE_REQUIRED_LIBRARIES PostgreSQL::PostgreSQL)