Check that local, top level, and exported include paths exist

Require directories listed in the include_dirs, local_include_dirs, and
exported_include_dirs properties to exist.

Change-Id: I5b079bd2c607839bb28dae43801cd7345bde2299
diff --git a/cc/cc.go b/cc/cc.go
index a928312..61e2568 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -404,6 +404,9 @@
 	}
 
 	// Include dir cflags
+	common.CheckSrcDirsExist(ctx, c.Properties.Include_dirs, "include_dirs")
+	common.CheckModuleSrcDirsExist(ctx, c.Properties.Local_include_dirs, "local_include_dirs")
+
 	rootIncludeDirs := pathtools.PrefixPaths(c.Properties.Include_dirs, ctx.AConfig().SrcDir())
 	localIncludeDirs := pathtools.PrefixPaths(c.Properties.Local_include_dirs, common.ModuleSrcDir(ctx))
 	flags.GlobalFlags = append(flags.GlobalFlags,
@@ -1096,6 +1099,8 @@
 
 	c.objFiles = objFiles
 	c.out = outputFile
+
+	common.CheckModuleSrcDirsExist(ctx, c.Properties.Export_include_dirs, "export_include_dirs")
 	includeDirs := pathtools.PrefixPaths(c.Properties.Export_include_dirs, common.ModuleSrcDir(ctx))
 	c.exportFlags = []string{includeDirsToFlags(includeDirs)}