apmd: Fix build with musl

Fix error like below
| apmd.c:372:41: error: use of undeclared identifier '__WCOREFLAG'
|                                 status = __W_EXITCODE(0, SIGTERM) | __WCOREFLAG;
|                                                                     ^
| apmd.c:392:41: error: use of undeclared identifier '__WCOREFLAG'
|                                 status = __W_EXITCODE(0, SIGTERM) | __WCOREFLAG;

(From OE-Core rev: b9c870a25757ab11f4167c076449a3de537247cf)

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

meta/recipes-bsp/apmd/apmd/wexitcode.patch

@@ -0,0 +1,26 @@
+Define non-posix W* funcitons
+
+C libraries like musl dont define them
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+
+Index: apmd-3.2.2.orig/apmd.c
+===================================================================
+--- apmd-3.2.2.orig.orig/apmd.c
++++ apmd-3.2.2.orig/apmd.c
+@@ -55,6 +55,14 @@
+ #define MINIMUM_RATE_CALC_TIME  120
+ #endif
+ 
++#ifndef _POSIX_SOURCE
++
++#define	__WCOREFLAG  0200
++#define __WCOREDUMP(x)  (_W_INT(x) & __WCOREFLAG)
++#define	__W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
++
++#endif
++
+ /*
+  * For the verbosity level feature to be useful,
+  * we rely on the fact that syslog.h assigns adjacent

meta/recipes-bsp/apmd/apmd_3.2.2-15.bb

@@ -13,6 +13,7 @@ SRC_URI = "${DEBIAN_MIRROR}/main/a/apmd/apmd_3.2.2.orig.tar.gz;name=tarball \
            file://legacy.patch \
            file://libtool.patch \
            file://unlinux.patch \
+           file://wexitcode.patch \
            file://init \
            file://default \
            file://apmd_proxy \