Use compat mkdtemp() on Solaris boxes

Define NO_MKDTEMP for all variants of SunOS; Solaris 10 does not
have mkdtemp() and all the other versions our Makefile knows
about don't have it either.

NO_{SETENV,UNSETENV,C99_FORMAT,STRTOUMAX} definitions cannot be
unified across versions.  Beginning with Solaris 10, the C-library
provides unsetenv(), setenv() and strtoumax().  Also 'z'/'t' formats
are supported.  However, older versions of Solaris do not support
these.


Signed-off-by: Guido Ostkamp <git@ostkamp.fastmail.fm>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -416,18 +416,17 @@ ifeq ($(uname_S),SunOS)
 	NO_STRCASESTR = YesPlease
 	NO_MEMMEM = YesPlease
 	NO_HSTRERROR = YesPlease
+	NO_MKDTEMP = YesPlease
 	ifeq ($(uname_R),5.8)
 		NEEDS_LIBICONV = YesPlease
 		NO_UNSETENV = YesPlease
 		NO_SETENV = YesPlease
-		NO_MKDTEMP = YesPlease
 		NO_C99_FORMAT = YesPlease
 		NO_STRTOUMAX = YesPlease
 	endif
 	ifeq ($(uname_R),5.9)
 		NO_UNSETENV = YesPlease
 		NO_SETENV = YesPlease
-		NO_MKDTEMP = YesPlease
 		NO_C99_FORMAT = YesPlease
 		NO_STRTOUMAX = YesPlease
 	endif