add a bunch of missing prototypes to tests


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93072 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/PR2599.m b/test/Analysis/PR2599.m
index e866ee6..d260961 100644
--- a/test/Analysis/PR2599.m
+++ b/test/Analysis/PR2599.m
@@ -53,6 +53,8 @@
 
 static char *lorem = "fooBarBaz";
 
+void NSLog(NSString *, ...);
+
 int main (int argc, const char * argv[]) {
   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
   NSString *tmp1 = NSSTRINGWRAPPER(lorem, 6); // no-warning