[lldb][NFCI] Include <cstdio> in SBDefines for FILE * definition

There are a few API headers that use FILE * but do not include the
correct header for their definition. Instead of including <cstdio> in each
of the headers manually, it seems easiest to include it in SBDefines to
get them all at once.

rdar://109579348

Differential Revision: https://reviews.llvm.org/D151381

Author: bulbazord

lldb/include/lldb/API/SBDefines.h

@@ -15,6 +15,8 @@
 #include "lldb/lldb-types.h"
 #include "lldb/lldb-versioning.h"
 
+#include <cstdio> // For FILE *
+
 #ifndef LLDB_API
 #if defined(_WIN32)
 #if defined(LLDB_IN_LIBLLDB)