(Do not land) Very hacky patch for using -fprofile-functions in the Win-Clang build

tools/cygprofile/cygprofile2_test.cc

Index: tools/cygprofile/cygprofile2_test.cc
diff --git a/tools/cygprofile/cygprofile2_test.cc b/tools/cygprofile/cygprofile2_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ba35685b1e5d1559bf311fafb54aa1b43696f577
--- /dev/null
+++ b/tools/cygprofile/cygprofile2_test.cc
@@ -0,0 +1,12 @@
+// In a VS command-prompt, build with:
+//
+// "third_party\llvm-build\Release+Asserts\bin\clang-cl" tools\cygprofile\cygprofile2_test.cc -Xclang -finstrument-functions /c /Foa.obj && "third_party\llvm-build\Release+Asserts\bin\clang-cl" a.obj tools\cygprofile\cygprofile2.cc /Fea.exe && a.exe
+
+
+#include <stdio.h>
+
+
+int main() {
+  //printf("hello\n");
+  return 0;
+}