pkg-config ftbfs in disco

https://launchpadlibrarian.net/417924357/buildlog_ubuntu-disco-amd64.pkg-config_0.29.1-0ubuntu2_BUILDING.txt.gz

PASS: check-version
PASS: check-requires-version
../pkg-config --list-all :
'sub1 Subdirectory package 1 - Test package 1 for subdirectory
broken Broken package - Module with broken .pc file
sub2 Subdirectory package 2 - Test package 2 for subdirectory' != 'sub1 Subdirectory package 1 - Test package 1 for subdirectory
sub2 Subdirectory package 2 - Test package 2 for subdirectory
broken Broken package - Module with broken .pc file'
FAIL: check-print-options
PASS: check-path
PASS: check-sysroot
PASS: check-uninstalled
PASS: check-debug
PASS: check-gtk
PASS: check-tilde
PASS: check-relocatable
PASS: check-variable-override
PASS: check-variables
==============================================================================
1 of 28 tests failed
Please report to https://bugs.freedesktop.org/enter_bug.cgi?product=pkg-config
==============================================================================
make[3]: *** [Makefile:411: check-TESTS] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/check'
make[2]: *** [Makefile:537: check-am] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>/check'
make[1]: *** [Makefile:715: check-recursive] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_test: make -j1 check VERBOSE=1 returned exit code 2
make: *** [debian/rules:22: build] Error 2