Get libc++ building on Sun Solaris. Patch from C Bergstrom.

llvm-svn: 226947
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: fbbfd09214a793f55fea9203760452926de1594d
diff --git a/include/random b/include/random
index a8d21a2..bccf92a 100644
--- a/include/random
+++ b/include/random
@@ -1634,9 +1634,10 @@
 
 #include <__config>
 #include <cstddef>
+#include <cstdint>
+#include <cmath>
 #include <type_traits>
 #include <initializer_list>
-#include <cstdint>
 #include <limits>
 #include <algorithm>
 #include <numeric>
@@ -1644,7 +1645,6 @@
 #include <string>
 #include <istream>
 #include <ostream>
-#include <cmath>
 
 #include <__undef_min_max>