Patch from Christopher Currie, changes building with sunpro tools to use the C compiler instead of the C++ compiler.

[SVN r19263]

tools/build

@@ -1 +1 @@
-Subproject commit b66c7b33b329beca491dd403836d571c9232ca7c
+Subproject commit 4b1186fdcfc06489332d0e176f05a3641b9d8cd0