pkg-config: Add --dont-define-prefix when PKG_CONFIG_WITHOUT_PREFIX

Imported from MSYS2 patch.
26 jobs for !5930 with pkgconfig-no-prefix in 4 minutes and 54 seconds (queued for 5 seconds)
latest detached
Status Job ID Name Coverage
  Build
manual #5638974
linux docker cmake build manual
build:centos6-x86_64
passed #5638971
linux docker cmake build
build:debian10-iwyu

00:02:25

manual #5638975
linux docker cmake build linux-3.17 manual
build:fedora33-ninja
passed #5638973
linux docker cmake build linux-3.17
build:fedora33-sphinx

00:04:54

passed #5638972
linux docker cmake build linux-3.17
build:fedora33-tidy

00:03:29

manual #5638977
cmake macos shell nonconcurrent xcode-12.4 manual
build:macos-x86_64-makefiles
manual #5638976
cmake macos shell nonconcurrent xcode-12.4 manual
build:macos-x86_64-ninja
manual #5638978
windows cmake shell vs2019 nonconcurrent msvc-19.28 manual
build:windows-vs2019-x64-ninja
 
  Test
created #5638979
linux docker cmake x11 linux-3.17
test:fedora33-ninja
created #5638981
cmake macos shell nonconcurrent xcode-12.4
test:macos-x86_64-makefiles
created #5638980
cmake macos shell nonconcurrent xcode-12.4
test:macos-x86_64-ninja
created #5638982
windows cmake shell vs2019 nonconcurrent msvc-19.28
test:windows-vs2019-x64-ninja
 
  Test Ext
created #5638985
linux docker cmake cuda-rt
test:cuda10.2-nvidia
created #5638983
linux docker cmake build linux-3.17
test:debian10-ninja
created #5638984
linux docker cmake build linux-3.17
test:fedora33-makefiles
created #5638986
linux docker cmake build linux-3.17
test:fedora33-ninja-multi
created #5638987
cmake macos shell concurrent xcode-12.4
test:macos-x86_64-xcode
created #5638988
windows cmake shell vs2019 concurrent msvc-19.28
test:windows-vs2019-x64
 
  External
passed cdash

passed ghostflow-check-master

passed ghostflow-check-release

passed cdash

passed cdash

passed cdash

passed cdash

passed cdash