undefine USE_R_INTERNALS for FastR; add -DFastR to g++ compilations

com.oracle.truffle.r.native/gnur/edAddFASTR

 g/R_HOME/s/R_HOME/FASTR_R_HOME/
 /^CFLAGS/s/$/ -DFASTR/
+/^CXXFLAGS/s/$/ -DFASTR/
 w
 q

com.oracle.truffle.r.native/include/ed_Rinternals

+/USE_RINTERNALS section/
+i
+#ifdef FASTR
+#undef USE_R_INTERNALS
+#else
+.
++1
+a
+#endif
+.
 /typedef struct SEXPREC \*SEXP;/
 i
 #ifdef FASTR
@@ -44,7 +54,7 @@ a
 /R_NamespaceRegistry/
 i
 #ifdef FASTR
-LibExtern SEXP FASTR_R_NamespaceRegistry();
+LibExtern SEXP FASTR_NamespaceRegistry();
 #define R_NamespaceRegistry FASTR_NamespaceRegistry()
 #else
 .