Emit PERLASM_SCHEME to fix GitMake on OS X

This fixes the errors when trying to assemble .s files using GitMake on OS X.

Change-Id: I2221f558619302d22e0c57d7203173d634155678
Signed-off-by: Mike Bland <mbland@acm.org>
Signed-off-by: Geoff Thorpe <geoff@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>

util/mk1mf.pl

diff --git a/util/mk1mf.pl b/util/mk1mf.pl
index 48c71b8..73523ef 100755
--- a/util/mk1mf.pl
+++ b/util/mk1mf.pl
@@ -66,6 +66,7 @@
 	CMLL_ENC       => \$mf_cm_asm,
 	MODES_ASM_OBJ  => \$mf_modes_asm,
         ENGINES_ASM_OBJ=> \$mf_engines_asm,
+	PERLASM_SCHEME => \$mf_perlasm_scheme,
 	FIPSCANISTERONLY  => \$mf_fipscanisteronly,
 	FIPSCANISTERINTERNAL  => \$mf_fipscanisterinternal,
 	EC_ASM	       => \$mf_ec_asm,
@@ -673,6 +674,7 @@
 INCO_D=$inc_dir${o}openssl
 
 PERL=$perl
+PERLASM_SCHEME=$mf_perlasm_scheme
 CP=$cp
 CP2=$cp2
 RM=$rm