perl: Fix encode module reproducibility issues

The code is encoding host compiler parameters into target builds. Avoid
this for our target builds. This should resolve builds which aren't
reproducible between hosts with different compilers.

(From OE-Core rev: 71cdbf426e46e3ca1b5038f40e9f7ba958abc537)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/perl/files/encodefix.patch

@@ -0,0 +1,20 @@
+The code is encoding host compiler parameters into target builds. Avoid
+this for our target builds (patch is target specific, not native)
+
+Upstream-Status: Inappropriate [Cross compile hack]
+RP 2020/2/18
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+Index: perl-5.30.1/cpan/Encode/bin/enc2xs
+===================================================================
+--- perl-5.30.1.orig/cpan/Encode/bin/enc2xs
++++ perl-5.30.1/cpan/Encode/bin/enc2xs
+@@ -195,7 +195,7 @@ sub compiler_info {
+     # above becomes false.
+     my $sized  = $declaration && !($compat && !$pedantic);
+ 
+-    return ($cpp, $static, $sized);
++    return (0, 1, 1);
+ }
+ 
+ 

meta/recipes-devtools/perl/perl_5.30.1.bb

@@ -26,6 +26,9 @@ SRC_URI = "https://www.cpan.org/src/5.0/perl-${PV}.tar.gz;name=perl \
 SRC_URI_append_class-native = " \
            file://perl-configpm-switch.patch \
 "
+SRC_URI_append_class-target = " \
+           file://encodefix.patch \
+"
 
 SRC_URI[perl.md5sum] = "6438eb7b8db9bbde28e01086de376a46"
 SRC_URI[perl.sha256sum] = "bf3d25571ff1ee94186177c2cdef87867fd6a14aa5a84f0b1fb7bf798f42f964"