Export path to the Ninja executable

This path will be used as CMAKE_MAKE_PROGRAM explicitly.

Change-Id: Ic15253f837b798c468f782ad4116d1ba4cc7c934
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

coin/provisioning/common/linux/install-ninja.sh

@@ -38,5 +38,6 @@ installPrefix="/opt/$dirname"
 sudo mv "$HOME/$dirname" "$installPrefix"
 
 SetEnvVar "PATH" "$installPrefix:\$PATH"
+SetEnvVar "NINJA_EXECUTABLE" "$installPrefix/ninja"
 
 echo "ninja = $version" >> ~/versions.txt

coin/provisioning/common/macos/ninja.sh

@@ -6,6 +6,7 @@
 
 # shellcheck source=./../unix/InstallFromCompressedFileFromURL.sh
 source "${BASH_SOURCE%/*}/../unix/InstallFromCompressedFileFromURL.sh"
+source "${BASH_SOURCE%/*}/../unix/SetEnvVar.sh"
 
 version="1.10.2"
 internalUrl="http://ci-files01-hki.ci.qt.io/input/mac/ninja-mac_v${version}.zip"
@@ -15,4 +16,6 @@ DestDir="/usr/local/bin/"
 
 InstallFromCompressedFileFromURL "$internalUrl" "$externalUrl" "$SHA1" "$DestDir" ""
 
+SetEnvVar "NINJA_EXECUTABLE" "$DestDir/ninja"
+
 echo "Ninja = $version" >> ~/versions.txt

coin/provisioning/common/windows/ninja.ps1

@@ -50,6 +50,7 @@ $manifest = @"
 </assembly>
 "@
 
+Set-EnvironmentVariable "NINJA_EXECUTABLE" "C:\Utils\Ninja\ninja.exe"
 
 $vs2019 = [System.IO.File]::Exists("C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvarsall.bat")