Minor package fixes (#6334)

* Add no-implicit-fallthrough to MsgpackC

* Add 0.2.1 of Neovim

* Lint

var/spack/repos/builtin/packages/msgpack-c/package.py

@@ -33,3 +33,10 @@ class MsgpackC(CMakePackage):
     version('1.4.1', 'e2fd3a7419b9bc49e5017fdbefab87e0')
 
     depends_on('cmake@2.8.12:', type='build')
+
+    def cmake_args(self):
+        args = [
+            "-DCMAKE_CXX_FLAGS=-Wno-implicit-fallthrough",
+            "-DCMAKE_C_FLAGS=-Wno-implicit-fallthrough"
+        ]
+        return args

var/spack/repos/builtin/packages/neovim/package.py

@@ -32,6 +32,7 @@ class Neovim(CMakePackage):
     homepage = "http://neovim.io"
     url      = "https://github.com/neovim/neovim/archive/v0.2.0.tar.gz"
 
+    version('0.2.1', 'f4271f22d2a46fa18dace42849c56a98')
     version('0.2.0', '9af7f61f9f0b1a2891147a479d185aa2')
 
     depends_on('lua@5.1:5.2')
@@ -44,10 +45,11 @@ class Neovim(CMakePackage):
     depends_on('libvterm')
     depends_on('unibilium')
     depends_on('msgpack-c')
+    depends_on('gperf')
 
     def cmake_args(self):
-        # FIXME: Add arguments other than
-        # FIXME: CMAKE_INSTALL_PREFIX and CMAKE_BUILD_TYPE
-        # FIXME: If not needed delete this function
         args = []
+        if version >= Version('0.2.1'):
+            args = ['-DPREFER_LUA=ON']
+
         return args