perl: another set of parallel build fixes

[YOCTO #784]

Imported more commits from the perl upstream tree

(From OE-Core rev: c3b74b0c3833541ab5e89a7f9597f1ef8a413a70)

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/perl/perl-5.12.2/parallel_build_fix_4.patch

@@ -0,0 +1,55 @@
+commit 43c0c913165d6abe1bc0cb45a784eb1c32c3700b
+Author: Nicholas Clark <nick@ccl4.org>
+Date:   Mon Feb 14 09:06:42 2011 +0000
+
+    For miniperl, use the USE_SITECUSTOMIZE feature to load the build-time @INC
+    
+    For miniperl (only), always enable USE_SITECUSTOMIZE, but change it to load
+    a buildcustomize.pl file from $INC[0], if present. The default @INC for
+    miniperl is '.', so by default this does nothing.
+
+diff --git a/perl.c b/perl.c
+index 8f8565d..6bb9f46 100644
+--- a/perl.c
++++ b/perl.c
+@@ -24,6 +24,10 @@
+  * function of the interpreter; that can be found in perlmain.c
+  */
+ 
++#ifdef PERL_IS_MINIPERL
++#  define USE_SITECUSTOMIZE
++#endif
++
+ #include "EXTERN.h"
+ #define PERL_IN_PERL_C
+ #include "perl.h"
+@@ -1973,15 +1977,26 @@ S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
+     }
+     }
+ 
+-#if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
++#if defined(USE_SITECUSTOMIZE)
+     if (!minus_f) {
+-	/* SITELIB_EXP is a function call on Win32.
+-	   The games with local $! are to avoid setting errno if there is no
++	/* The games with local $! are to avoid setting errno if there is no
+ 	   sitecustomize script.  */
++#  ifdef PERL_IS_MINIPERL
++	AV *const inc = GvAV(PL_incgv);
++	SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
++
++	if (inc0) {
++	    (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
++						 Perl_newSVpvf(aTHX_
++							       "BEGIN { do {local $!; -f '%"SVf"/buildcustomize.pl'} && do '%"SVf"/buildcustomize.pl' }", *inc0, *inc0));
++	}
++#  else
++	/* SITELIB_EXP is a function call on Win32.  */
+ 	const char *const sitelib = SITELIB_EXP;
+ 	(void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
+ 					     Perl_newSVpvf(aTHX_
+ 							   "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
++#  endif
+     }
+ #endif
+