[newlib-cygwin] Upload builddir

[Jon Turney]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=79fe86dd0dfcef84d2a8b541152d5abc4cfcbb2d

commit 79fe86dd0dfcef84d2a8b541152d5abc4cfcbb2d
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Sat Jul 8 20:53:54 2023 +0100

    Upload builddir

Diff:
---
 .github/workflows/cygwin.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 248a3e4cd..e625e8d43 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -120,3 +120,11 @@ jobs:
         (export PATH=${{ matrix.target }}/winsup/testsuite/testinst/bin:${PATH} && cmd /c $(cygpath -wa ${{ matrix.target }}/winsup/cygserver/cygserver) &) &&
         (cd ${{ matrix.target }}/winsup; make check || true)
       shell: C:\cygwin\bin\bash.exe --noprofile --norc -eo pipefail '{0}'
+
+    # upload builddir for possible investigation of problems
+    - name: Upload builddir archive
+      uses: actions/upload-artifact@v3
+      with:
+        name: testlogs
+        path: build\${{ matrix.target }}\winsup\testsuite\*.log
+      if: ${{ !cancelled() }}