Fixed bugreport:5990 OSX compiling error / warnings

Bug in Detail:
 - Misplaced LDFLAGS uage in some Makefile templates (by passing them to the compiler not to the linker.)
 - Wrong usage of volatile (a functions return value couldnt be declared to return volatile :D )
 - Unsupported Inline ASM using lock xchg operation on llvm-gcc .. (apple loves this ..)

Fixed by:
 - Removed unnecessary LDFLAGS 
 - Removed unnecessary volatile declarator
 - Replaced InterlockedExchange and InterlockedExchange64 with gcc intrinsics. 



git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@16270 54d463be-8e91-2dee-dedb-b68131a5f0ec

3rdparty/libconfig/Makefile.in

@@ -23,4 +23,4 @@ help:
 
 %.o: %.c $(LIBCONFIG_H)
 	@echo "	CC	$<"
-	@@CC@ @CFLAGS@ @DEFS@ @LDFLAGS@ @CPPFLAGS@ -c $(OUTPUT_OPTION) $<
+	@@CC@ @CFLAGS@ @DEFS@ @CPPFLAGS@ -c $(OUTPUT_OPTION) $<

3rdparty/mt19937ar/Makefile.in

@@ -23,4 +23,4 @@ help:
 
 %.o: %.c $(MT19937AR_H)
 	@echo "	CC	$<"
-	@@CC@ @CFLAGS@ @LDFLAGS@ @CPPFLAGS@ -c $(OUTPUT_OPTION) $<
+	@@CC@ @CFLAGS@ @CPPFLAGS@ -c $(OUTPUT_OPTION) $<