efivar: fix unknown option while gold linker used

- Use '-fPIC' to replace 'PIC';

- Use 'pie' to replace 'PIE'

- Remove unknown '--add-needed'

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-extended/efivar/efivar/0004-fix-unknow-option-for-gold-linker.patch

@@ -0,0 +1,38 @@
+From b3d35e7dd27a755df5acbe050837885914dbb28b Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Tue, 10 May 2016 11:34:50 -0400
+Subject: [PATCH]  fix unknow option for gold linker
+
+- Revert the following patch, since oe-core work with gcc 5
+...
+commit 3055a3797f16693dfdd855fa68bc57fd900dc408
+Author: Peter Jones <pjones@redhat.com>
+Date:   Mon Feb 15 14:15:40 2016 -0500
+
+    Make gcc.specs work with gcc 6 / binutils 2.26
+
+    Apparently binutils 2.26 gets real picky about "ld -PIC" vs "ld -fPIC".
+
+    Signed-off-by: Peter Jones <pjones@redhat.com>
+...
+
+- Remove unknown option '--add-needed'
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ gcc.specs | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gcc.specs b/gcc.specs
+index 24fabc2..5b0fdef 100644
+--- a/gcc.specs
++++ b/gcc.specs
+@@ -14,4 +14,4 @@
+ + %{!shared:%{!static:%{!r:-pie}}} %{static:-Wl,-no-fatal-warnings -Wl,-static -static -Wl,-z,relro,-z,now}
+ 
+ *link:
+-+ %{!static:--fatal-warnings} --no-undefined-version --no-allow-shlib-undefined --add-needed -z now --build-id %{!static:%{!shared:-PIE}} %{shared:-z relro -PIC} %{static:%<pie}
+++ %{!static:--fatal-warnings} --no-undefined-version --no-allow-shlib-undefined -z now --build-id %{!static:%{!shared:-pie}} %{shared:-z relro -fPIC} %{static:%<pie}
+-- 
+2.8.1
+

meta-oe/recipes-extended/efivar/efivar_0.23.bb

@@ -12,6 +12,7 @@ SRC_URI = "git://github.com/rhinstaller/efivar.git"
 SRC_URI_append_class-target = " file://0001-efivar-fix-for-cross-compile.patch \
                                 file://0002-disable-static-build.patch \
                                 file://0003-efivar-fix-for-cross-compile.patch \
+                                file://0004-fix-unknow-option-for-gold-linker.patch \
                               "
 
 S = "${WORKDIR}/git"