Use the identified python when building System.Private.CoreLib (#19043)

build.sh and build.cmd contain logic to identify a working version of
python to use. System.Private.CoreLib ignores that and directly invokes
'python', which may not work, or even execute a different program.

1 files changed, 2 insertions, 0 deletions

diff --git a/build.sh b/build.sh
index 091d6227ca..4002f2744c 100755
--- a/build.sh
+++ b/build.sh
@@ -22,6 +22,8 @@ then
    exit 1
 fi
 
+export PYTHON
+
 usage()
 {
     echo "Usage: $0 [BuildArch] [BuildType] [-verbose] [-coverage] [-cross] [-clangx.y] [-ninja] [-configureonly] [-skipconfigure] [-skipnative] [-skipmscorlib] [-skiptests] [-stripsymbols] [-ignorewarnings] [-cmakeargs] [-bindir]"