Set AR similarly to CC.

This mostly just moves the win32 AR setting into win32.tup, and makes
the structure mirror that of CC.

Tuprules.tup

@@ -21,24 +21,6 @@ CFLAGS += -fsanitize=undefined
 LDFLAGS += -lubsan
 endif
 
-ifdef AR
-AR = @(AR)
-else
-ifeq ($(TARGET),win32)
-AR = x86_64-w64-mingw32-ar
-else
-AR = ar
-endif
-endif
-
-# Override AR settings if being built with busybox kconfig
-ifeq ($(AR),y)
-AR = ar
-endif
-ifeq ($(AR),n)
-AR = ar
-endif
-
 CFLAGS += -W
 CFLAGS += -Wall
 ifeq (@(TUP_WERROR),y)
@@ -81,6 +63,7 @@ endif
 # included $(TARGET).tup file, and can be overridden by the user in the
 # tup.config file by setting CONFIG_CC (and/or CONFIG_CC32 on Windows).
 CC = gcc
+AR = ar
 
 TUP_MONITOR = null
 TUP_SUID_GROUP = root
@@ -95,6 +78,18 @@ ifdef CC32
 CC32 = @(CC32)
 endif
 
+ifdef AR
+AR = @(AR)
+endif
+
+# Override AR settings if being built with busybox kconfig
+ifeq ($(AR),y)
+AR = ar
+endif
+ifeq ($(AR),n)
+AR = ar
+endif
+
 ifdef TUP_USE_SYSTEM_PCRE
 use_system_pcre = @(TUP_USE_SYSTEM_PCRE)
 else

win32.tup

@@ -1,5 +1,6 @@
 CC = x86_64-w64-mingw32-gcc
 CC32 = i686-w64-mingw32-gcc
+AR = x86_64-w64-mingw32-ar
 
 # Compatibility function prototypes and include path for wrapper functions
 CFLAGS += -include $(TUP_CWD)/src/compat/win32/mingw.h