scons: add postgres lib manually after switch to using pg_config for libs and includes (nice catch podolsir)

AUTHORS

@@ -32,6 +32,7 @@ Patches
  - Dražen Odobašić
  - Martijn van Oosterhout
  - Cameron Patrick
+ - Igor Podolskiy
  - Marcin Rudowski
  - Reid Priedhorsky
  - Brian Quinion

SConstruct

@@ -291,6 +291,9 @@ def parse_pg_config(context, config):
         inc_path = call('%s --includedir' % env[config])
         env.AppendUnique(CPPPATH = inc_path)
         env.AppendUnique(LIBPATH = lib_path)
+        lpq = env['PLUGINS']['postgis']['lib']
+        import pdb;pdb.set_trace()
+        env.Append(LIBS = lpq)
     else:
         env['SKIPPED_DEPS'].append(tool)
     context.Result( ret )