fixup! config.mak.uname: add support for clangarm64

This reverts a mistake of mine: My change to introduce an "else ifeq"
chain missed that there is an `else` clause that should be used for
MINGW32 (to add large-address-awareness and use 32-bit `time_t`) but not
for CLANGARM64 nor for MINGW64.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

config.mak.uname

@@ -728,7 +728,8 @@ ifeq ($(uname_S),MINGW)
 		prefix = /mingw32
 		HOST_CPU = i686
 		BASIC_LDFLAGS += -Wl,--pic-executable,-e,_mainCRTStartup
-        else ifeq (MINGW64,$(MSYSTEM))
+        endif
+        ifeq (MINGW64,$(MSYSTEM))
 		prefix = /mingw64
 		HOST_CPU = x86_64
 		BASIC_LDFLAGS += -Wl,--pic-executable,-e,mainCRTStartup