Add -E option to rgbds, allows exporting all labels by default

include/asm/main.h

@@ -9,6 +9,7 @@ struct sOptions {
 	SLONG fillchar;
 	bool verbose;
 	bool haltnop;
+	bool exportall;
 	    //-1 == random
 };
 

include/asm/symbol.h

@@ -36,6 +36,7 @@ struct sSymbol {
 					 * not be changed during linking */
 
 ULONG calchash(char *s);
+void sym_SetExportAll(BBOOL set);
 void sym_PrepPass1(void);
 void sym_PrepPass2(void);
 void sym_AddLocalReloc(char *tzSym);