Compile with Intel CC: va_copy isn't defined.

This looks like a compiler bug. Intel CC uses the GCC headers, but
they appear to be incompatible. Bug will be reported, but meanwhile
work around the problem.

Reviewed-By: Trust Me

src/shared/cplusplus/Parser.cpp

@@ -58,6 +58,8 @@
 
 #ifdef _MSC_VER
 #    define va_copy(dst, src) ((dst) = (src))
+#elif defined(__INTEL_COMPILER) && !defined(va_copy)
+#    define va_copy __va_copy
 #endif
 
 #define CPLUSPLUS_NO_DEBUG_RULE

src/shared/cplusplus/TranslationUnit.cpp

@@ -60,6 +60,8 @@
 
 #ifdef _MSC_VER
 #    define va_copy(dst, src) ((dst) = (src))
+#elif defined(__INTEL_COMPILER) && !defined(va_copy)
+#    define va_copy __va_copy
 #endif
 
 using namespace CPlusPlus;