Configure: improved make dependencies for perl module.

Added missing dependencies for perl module's Makefile.

Simplified dependencies for perl module nginx.so: it depends
on Makefile that in turn depends on other perl bits.
diff --git a/auto/lib/perl/make b/auto/lib/perl/make
index d4dc300..dbfc83a 100644
--- a/auto/lib/perl/make
+++ b/auto/lib/perl/make
@@ -7,12 +7,8 @@
 
 $NGX_OBJS/src/http/modules/perl/blib/arch/auto/nginx/nginx.so: \\
 		\$(CORE_DEPS) \$(HTTP_DEPS) \\
-		src/http/modules/perl/nginx.pm \\
-		src/http/modules/perl/nginx.xs \\
 		src/http/modules/perl/ngx_http_perl_module.h \\
 		$NGX_OBJS/src/http/modules/perl/Makefile
-	cp src/http/modules/perl/nginx.* $NGX_OBJS/src/http/modules/perl/
-
 	cd $NGX_OBJS/src/http/modules/perl && \$(MAKE)
 
 	rm -rf $NGX_OBJS/install_perl
@@ -20,7 +16,9 @@
 
 $NGX_OBJS/src/http/modules/perl/Makefile: \\
 		src/http/modules/perl/Makefile.PL \\
-		src/http/modules/perl/nginx.pm
+		src/http/modules/perl/nginx.pm \\
+		src/http/modules/perl/nginx.xs \\
+		src/http/modules/perl/typemap
 	cp -p src/http/modules/perl/nginx.* $NGX_OBJS/src/http/modules/perl/
 	cp -p src/http/modules/perl/typemap $NGX_OBJS/src/http/modules/perl/
 	cp -p src/http/modules/perl/Makefile.PL $NGX_OBJS/src/http/modules/perl/