cmake: learn to optionally skip linking dashed built-ins

In Git for Windows, we would like to make use of the fact that our CMake-based build can also install the files into their final location. This patch series helps with that.

Changes since v1:

* Use proper string/variable CMake syntax, as pointed out by Danh

Dennis Ameling (2):
cmake(install): fix double .exe suffixes
cmake(install): include vcpkg dlls

Johannes Schindelin (2):
cmake: support SKIP_DASHED_BUILT_INS
cmake: add a preparatory work-around to accommodate vcpkg

 .github/workflows/main.yml          |  5 +++++
 contrib/buildsystems/CMakeLists.txt | 26 +++++++++++++++++++-------
 2 files changed, 24 insertions(+), 7 deletions(-)

base-commit: 773e25afc41b1b6533fa9ae2cd825d0b4a697fad
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-887%2Fdscho%2Fskip-dashed-built-ins-in-cmake-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-887/dscho/skip-dashed-built-ins-in-cmake-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/887

Range-diff vs v1:

 1:  ff7e8121d7a4 = 1:  ff7e8121d7a4 cmake: support SKIP_DASHED_BUILT_INS
 2:  69856f278645 = 2:  69856f278645 cmake(install): fix double .exe suffixes
 3:  543fd0f5d7e5 ! 3:  5d953a21e9bd cmake: add a preparatory work-around to accommodate `vcpkg`

@@ contrib/buildsystems/CMakeLists.txt: list(TRANSFORM git_shell_scripts PREPEND "$
#install
-install(TARGETS git git-shell
+foreach(program ${PROGRAMS_BUILT})
-+if(${program} STREQUAL git OR ${program} STREQUAL git-shell) ++if(program STREQUAL "git" OR program STREQUAL "git-shell")
+install(TARGETS ${program}
RUNTIME DESTINATION bin)
+else()
4: 4b183c7def58 = 4: f020cb517dfc cmake(install): include vcpkg dlls

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