Git.pm: assorted build related fixes.

- We passed our own *.a archives as LIBS to the submake that runs
   in perl/; separate LIBS and EXTLIBS and pass the latter which
   tells what the system libraries are used.

 - The quoting of preprocesor symbol definitions passed down to
   perl/ submake was loose and we lost double quotes around
   include directives.  Use *_SQ to quote them properly.

 - The installation location of perl/ submake is not
   architecture neutral anymore, so use SITEARCH instead of
   SITELIB.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>

perl/Git.xs

@@ -29,7 +29,7 @@ report_xs(const char *prefix, const char *err, va_list params)
 	return buf;
 }
 
-void
+static void NORETURN
 die_xs(const char *err, va_list params)
 {
 	char *str;
@@ -37,13 +37,12 @@ die_xs(const char *err, va_list params)
 	croak(str);
 }
 
-int
+static void
 error_xs(const char *err, va_list params)
 {
 	char *str;
 	str = report_xs("error: ", err, params);
 	warn(str);
-	return -1;
 }
 
 

perl/Makefile.PL

@@ -3,7 +3,7 @@ use ExtUtils::MakeMaker;
 sub MY::postamble {
 	return <<'MAKE_FRAG';
 instlibdir:
-	@echo $(INSTALLSITELIB)
+	@echo $(INSTALLSITEARCH)
 
 MAKE_FRAG
 }