Upgrade fcp to use cmake in llvm

Summary:
Fetch newest version fo facebook-clang-plugins which builds clang with cmake instead of configure + make
update-submodule: facebook-clang-plugins

Reviewed By: jvillard

Differential Revision: D3366349

fbshipit-source-id: 95a0c9f

configure.ac

@@ -100,6 +100,11 @@ AS_IF([test "x$enable_c_analyzers" = "xyes"], [
 
   AC_CHECK_TOOL([SHASUM], [shasum], [no])
   AC_ASSERT_PROG([shasum], [$SHASUM])
+  # cmake is required to build llvm+clang
+  AS_IF([test "x$is_release_tree" = "xno"], [
+    AC_CHECK_TOOL([CMAKE], [cmake], [no])
+    AC_ASSERT_PROG([cmake], [$CMAKE])
+  ])
 ])
 # end if($enable_c_analyzers)
 

facebook-clang-plugins

@@ -1 +1 @@
-Subproject commit d80000de3620746585b69b05443a89cb4d7a5343
+Subproject commit c9593f66d93dc556a02c65894f2aae13b316802a