Update OpenBLAS commit to d6cf677

Fix build issue with gcc-9 on ppc64le

Author: mayeut

.github/workflows/build.yml

@@ -11,7 +11,7 @@ on:
     branches: [ master ]
 
 env:
-  OPENBLAS_COMMIT: "af2b0d0"
+  OPENBLAS_COMMIT: "d6cf677"
   OPENBLAS_ROOT: "c:\\opt"
 
 jobs:

.github/workflows/multibuild.yml

@@ -36,7 +36,7 @@ jobs:
             INTERFACE64: '1'
     env:
       REPO_DIR: OpenBLAS
-      OPENBLAS_COMMIT: af2b0d0
+      OPENBLAS_COMMIT: d6cf677
       MACOSX_DEPLOYMENT_TARGET: 10.9
       MB_PYTHON_VERSION: ${{ matrix.python-version }}
       TRAVIS_PYTHON_VERSION: ${{ matrix.python-version }}

.travis.yml

@@ -2,7 +2,7 @@ env:
     global:
         # The archive that gets built has name from ``git describe`` on this
         # commit.
-        - OPENBLAS_COMMIT=af2b0d0
+        - OPENBLAS_COMMIT=d6cf677
         - REPO_DIR=OpenBLAS
         # Following generated with:
         # travis encrypt -r MacPython/openblas-libs OPENBLAS_LIBS_STAGING_UPLOAD_TOKEN=<secret token value>