Add permission-setting for MacOS pipeline failure (#42)

* Add direct bash execution to avoid permission failures

Examples/DotNetCoreBuild/build.sh

@@ -4,9 +4,7 @@ readonly MY_DIR=$(cd `dirname ${BASH_SOURCE[0]}` && pwd)
 
 source "${MY_DIR}/env.sh"
 
-chmod +x "${MacOsScriptsDir}/bxl.sh"
-
-"${MacOsScriptsDir}/bxl.sh"                 \
+/bin/bash "${MacOsScriptsDir}/bxl.sh"       \
   --config "$MY_DIR/config.dsc"             \
   --symlink-sdks-into "$MY_DIR/sdk"         \
   --buildxl-bin "$BUILDXL_BIN"              \

Examples/DotNetCoreBuild/validate-build.sh

@@ -4,8 +4,7 @@ readonly MY_DIR=$(cd `dirname ${BASH_SOURCE[0]}` && pwd)
 readonly ARGS="$@"
 
 function run_build {
-    local additionalArgs="$@"
-    $MY_DIR/validate-build-kext.sh /logsDirectory:"$bxlLogDir" /o:"$bxlObjDir" $ARGS $additionalArgs
+    /bin/bash $MY_DIR/validate-build-kext.sh /logsDirectory:"$bxlLogDir" /o:"$bxlObjDir" $ARGS "$@"
 }
 
 function check_graph_reloaded {