test: Add the feature "shell". Frontend/dependency-gen.c would be executable with shell.

The feature "shell" is implemented in llvm/test.

llvm-svn: 126646

clang/test/Frontend/dependency-gen.c

@@ -8,7 +8,8 @@
 // RUN: grep 'dependency-gen.c' %t.d
 
 // PR8974
-// XFAIL: win32
+// REQUIRES: shell
+// "cd %t.dir" requires shell.
 // RUN: rm -rf %t.dir
 // RUN: mkdir -p %t.dir/a/b
 // RUN: echo > %t.dir/a/b/x.h

clang/test/lit.cfg

@@ -166,3 +166,7 @@ config.substitutions.append(
 # Set available features we allow tests to conditionalize on.
 if platform.system() != 'Windows':
     config.available_features.add('crash-recovery')
+
+# Shell execution
+if platform.system() not in ['Windows'] or lit.getBashPath() != '':
+    config.available_features.add('shell')