[github-actions] Windows: Prevent -dirty suffix in version string by disabling CRLF conversion

.gitattributes

@@ -0,0 +1 @@
+* text=auto

.github/workflows/build.yml

@@ -127,6 +127,7 @@ jobs:
           dest=`echo ${{ matrix.msystem }} |tr [:upper:] [:lower:]`
           echo "dest=$dest" >> $GITHUB_ENV
           echo "target_triplet=`gcc -dumpmachine`" >> $GITHUB_ENV
+          git config --global core.autocrlf false
     - uses: actions/checkout@v2
       with:
         fetch-depth: 0