Merge pull request #1833 from petterreinholdtsen/po4a-halcomple-rephrase

Rephrase halcomple man header to quiet down po4a

Author: jepler

src/hal/utils/halcompile.g

@@ -889,8 +889,8 @@ def document(filename, outfilename):
     print("""
 .\\"*******************************************************************
 .\\"
-.\\" This file was generated with halcompile.g.
-.\\" Modify the source file %s.
+.\\" This file was extracted from %s using halcompile.g.
+.\\" Modify the source file.
 .\\"
 .\\"*******************************************************************
 """ % filename, file=f)