upgrade script failing on winnie

[robe]

TMPDIR is /projects/postgis/tmp/2.5.0dev_pg10_geos3.7.0dev_gdal2.2.4w64
Creating database 'postgis_reg' 
Preparing db 'postgis_reg' using: CREATE EXTENSION postgis
Died at run_test.pl line 1300.
 failed (Error encountered creating EXTENSION POSTGIS: /projects/postgis/tmp/2.5.0dev_pg10_geos3.7.0dev_gdal2.2.4w64/regress_log)
-----------------------------------------------------------------------------
sh: createlang: command not found
ERROR:  extension "postgis" has no installation script nor update path for version "2.5.0beta1dev"
-----------------------------------------------------------------------------
Makefile:307: recipe for target 'check' failed
make[1]: *** [check] Error 1
make[1]: Leaving directory '/projects/postgis/branches/2.5/regress'
GNUmakefile:16: recipe for target 'check' failed
make: *** [check] Error 1

e:\jenkins\postgis>exit 2 
Build step 'Execute Windows batch command' marked build as failure
An attempt to send an e-mail to empty list of recipients, ignored.
Triggering a new build of PG_ED_STOP
Finished: FAILURE

[robe]

I forgot I had the job the version hardcoded so was still passing dev. So fix was to change the job not the postgis code.

I'll revisit later to make the ci script more resilient.