gettext: Fix overloadable error with clang

Clang detects that getcwd is being re-declared and signatures don't
match, simple solution is to let clang use overloadable attribute

(From OE-Core rev: d32626c3c5b034b72495c2949b3e94ca55f04a9b)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/gettext/gettext-0.20.1/overloadable.patch

@@ -0,0 +1,22 @@
+Use overloadable attribute to aid clang
+
+Fixes
+dcigettext.c:147:7: error: redeclaration of 'getcwd' must have the 'overloadable' attribute
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+--- a/gettext-runtime/intl/dcigettext.c
++++ b/gettext-runtime/intl/dcigettext.c
+@@ -144,7 +144,11 @@ char *getwd ();
+ #  if VMS
+ #   define getcwd(buf, max) (getcwd) (buf, max, 0)
+ #  else
+-char *getcwd ();
++char 
++#ifdef __clang__
++__attribute__((overloadable))
++#endif
++*getcwd ();
+ #  endif
+ # endif
+ # ifndef HAVE_STPCPY

meta/recipes-core/gettext/gettext_0.20.1.bb

@@ -25,6 +25,7 @@ SRC_URI = "${GNU_MIRROR}/gettext/gettext-${PV}.tar.gz \
            file://serial-tests-config.patch \
            file://0001-msgmerge-Fix-behaviour-of-for-msgfmt-on-PO-files-wit.patch \
            file://0001-tests-autopoint-3-unset-MAKEFLAGS.patch \
+           file://overloadable.patch \
            "
 
 SRC_URI[md5sum] = "bb5b0c0caa028105f3ca1905ddc306e2"