Fix Sun toolset so that we invoke cc for C files, not CC. Unfortunately

the compiler does not have a switch to change the source language, so we
take the command and replace the filename in the last element with 'cc'.


[SVN r23539]

tools/build

@@ -1 +1 @@
-Subproject commit f0a56b5af259869c706e649037934d3a3b17b82a
+Subproject commit 4d0f6b6662fcea8cbe0697de79d2f41b13331978