automake: Backport perl 5.22 fix

Backport 13f00eb4493c "automake: port to Perl 5.22 and later"
from automake upstream to fix build with perl 5.22 .

(From OE-Core rev: ab0e298ec2c155739565f1cde76639855ba7bba0)

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/automake/automake/0001-automake-port-to-Perl-5.22-and-later.patch

@@ -0,0 +1,32 @@
+From 13f00eb4493c217269b76614759e452d8302955e Mon Sep 17 00:00:00 2001
+From: Paul Eggert <eggert@cs.ucla.edu>
+Date: Thu, 31 Mar 2016 16:35:29 -0700
+Subject: [PATCH] automake: port to Perl 5.22 and later
+
+Without this change, Perl 5.22 complains "Unescaped left brace in
+regex is deprecated" and this is planned to become a hard error in
+Perl 5.26.  See:
+http://search.cpan.org/dist/perl-5.22.0/pod/perldelta.pod#A_literal_%22{%22_should_now_be_escaped_in_a_pattern
+* bin/automake.in (substitute_ac_subst_variables): Escape left brace.
+
+Upstream-Status: Backport [13f00eb4493c217269b76614759e452d8302955e]
+---
+ bin/automake.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/bin/automake.in b/bin/automake.in
+index a3a0aa318..2c8f31e14 100644
+--- a/bin/automake.in
++++ b/bin/automake.in
+@@ -3878,7 +3878,7 @@ sub substitute_ac_subst_variables_worker
+ sub substitute_ac_subst_variables
+ {
+   my ($text) = @_;
+-  $text =~ s/\${([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;
++  $text =~ s/\$[{]([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;
+   return $text;
+ }
+ 
+-- 
+2.11.0
+

meta/recipes-devtools/automake/automake_1.15.bb

@@ -24,6 +24,7 @@ SRC_URI += "file://python-libdir.patch \
             file://performance.patch \
             file://new_rt_path_for_test-driver.patch \
             file://automake-replace-w-option-in-shebangs-with-modern-use-warnings.patch \
+            file://0001-automake-port-to-Perl-5.22-and-later.patch \
             "
 
 SRC_URI[md5sum] = "716946a105ca228ab545fc37a70df3a3"