Make builds deterministic

- Remove use of __DATE__ and __TIME__, it was dead code anyway
- Set ar to deterministic mode

This allows consecutive rebuilds to produce identical binaries.

Author: 9ary

Makefile

@@ -26,10 +26,10 @@ export LIBOGC_MINOR	:= 1
 export LIBOGC_PATCH	:= 0
 
 include	$(DEVKITPPC)/base_rules
+export AR	:=	$(AR) -D
 
 BUILD		:=	build
 
-DATESTRING	:=	$(shell date +%Y%m%d)
 VERSTRING	:=	$(shell printf "r%s.%s" "$$(git rev-list --count HEAD)" "$$(git rev-parse --short=7 HEAD)")
 
 #---------------------------------------------------------------------------------

libogc/system.c

@@ -221,7 +221,6 @@ static sys_resetinfo mem_resetinfo = {
 	127
 };
 
-static const char *__sys_versiondate;
 static const char *__sys_versionbuild;
 
 static void (*reload)(void) = (void(*)(void))0x80001800;
@@ -974,7 +973,7 @@ void* __SYS_GetIPCBufferHi(void)
 #endif
 
 void _V_EXPORTNAME(void)
-{ __sys_versionbuild = _V_STRING; __sys_versiondate = _V_DATE_; }
+{ __sys_versionbuild = _V_STRING; }
 
 #if defined(HW_RVL)
 void __SYS_DoPowerCB(void)