- move PKG_CONFIG check early in the process
- use --silence-errors more
* macros/pkg.m4: work around a pkg-config bug that outputs
errors to stderr even when you tell it to output to stdout.
git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@12332 57a11ea4-9604-0410-9ed3-97b8803252fd